Philips Semiconductors 1880 MHz PA Driver with BFG21W 1880 MHz PA Driver with BFG21W Application Note JL-9901v0 Author Jarek Lucek April 9, 1999 Discrete Semiconductors - Mansfield 171 Forbes Blvd. Mansfield, MA 02048 Abstract th BFG21W, the new 5 generation transistor from Philips Semiconductors, is well suited for PA driver applications in AMPS, TDMA, CDMA and GSM systems. BFG21W’s performance is superior at 1880 MHz, 3.6V applications. Under CW mode, the part is capable of P1dB=24dBm, efficiency of over 50% and typical Gp of 12 dB. BFG21W delivers 23.5 dBm of linear output power under TDMA with a typical Gp of 12 dB and efficiency of above 45%. Under CDMA mode, BFG21W delivers 21 dBm of linear output power with a typical Gp of above 12 dB and efficiency of 40%. Philips Semiconductors 1880 MHz PA Driver with BFG21W INTRODUCTION BFG21W is Philips Semiconductors’ 5th generation silicon bipolar RF wideband transistor in a SOT343R plastic SMD package. The transistor delivers superior performance at frequencies below 3 GHz. It is manufactured according to the double poly process and characterized by a high transition frequency (fT > 20 GHz) at low sub 3 Volt supply voltages. This application notes describes BFG21W performance at 1880 MHz operation under CW, 2 Tone, TDMA and CDMA conditions. PERFORMANCE OVERVIEW The table below summarizes BFG21W’s typical performance capabilities under different signal conditions. System CW 2Tone TDMA CDMA Table 1: *- Vsupply 3.0 Volts 3.6 Volts 3.0 Volts 3.6 Volts 3.0 Volts 3.6 Volts 3.0 Volts 3.6 Volts P1dB or Plinear* dBm Gain** dB Efficiency*** % Icq=10mA Icq=20mA Icq=10mA Icq=20mA Icq=10mA Icq=20mA 22 24 18 19.5 21 23.5 19 21 22 24 18 19 21 23.5 19 21 12 12 12.5 12.5 11.5 11.5 12.5 12.5 12 12 12.5 13 12 12 12.5 13 56 52 30 35 45 49 39 42 56 52 30 30 45 50 40 39 BFG21W 1880 MHz PA driver performance summary CW - load power @ P1dB 2Tone - load power represents linear average power @ IMD levels reaching –28dBc. TDMA - load power represents linear average power @ ACPR levels reaching –26dBc or ALT levels reaching –45dBc. CDMA load power represents linear average power @ ACPR levels reaching –44dBc with 1.25MHz channel offset, 1.25MHz channel bandwidth and 30KHz Adjacent Channel bandwidth ** - typical Gain at P1dB for CW or Plinear for 2Tone, TDMA, CDMA signals *** - typical Efficiency at P1dB for CW or Plinear for 2Tone, TDMA, CDMA signals. 2 Philips Semiconductors 1880 MHz PA Driver with BFG21W CIRCUIT DESCRIPTION Figure 1 shows a circuit diagram for the 1880 MHz PA driver using the BFG21W. Appendix 1 includes the part list of the demo board. BFG21W, 1880 MHz demoboard Vbb Vs R2 5.1ohm R1 100ohm R3 30ohm C6 13pF PMBT3904 R4 10ohm C7 1nF C3 13pF OUTPUT INPUT VB C1 24pF C5 24pF BFG21W C4 2.4pF C2 3.0pF Figure 1: BFG21W common emitter demoboard for class-AB operation at 1880 MHz. 3 Philips Semiconductors 1880 MHz PA Driver with BFG21W BOARD LAYOUT Figure 3 shows the layout of the PCB, which has the following properties: type: double copper-clad PTFE fiber-glass (backside ground) h = 0.64 mm t = 35 µm (Cu cladding, not c oated) εr = 6.15 tanδ = 0.0019 Vbase bias Vbb R3 Vsupply Vs R1 R4 Q1 C7 R2 C3 C6 50 Ω INPUT 50 Ω OUTPUT C1 C2 C4 C5 T1 - BFG21W Figure 3: Layout of the 1880 MHz BFG21W PA driver. Appendix 1 contains the part list for the demo board. The position of C2 and C4 components is critical. The artwork file is available on a floppy disc (DXF or Gerber format). Appendix 2 contains Spice model for BFG21W. 4 Philips Semiconductors 1880 MHz PA Driver with BFG21W PERFORMANCE BFG21W was evaluated under 4 different modes of operation. Each mode of operation is summarized below. All measurements were taken with 100% duty cycle signal. CW BFG21W under CW at 1880 MHz and 25 deg. C Vc=3.6V, Icq=1mA, Vbb=0.9V Vc=3V, Icq=1mA,Vb=0.9V Pin Pout Pout Gain It Eff Pin Pout Pout Gain It Eff dBm -3.3 0 3.6 7.88 9.9 11.3 13.2 15.7 19 dBm 5 10 15 20 22 23 24 25 26 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 398.11 dB 8.3 10 11.4 12.12 12.1 11.7 10.8 9.3 7 mA 13 22 39 70 89 102 120 143 182 % 6.95 12.99 23.17 40.82 50.88 55.89 59.81 63.18 62.50 dBm -2.9 0.4 4 8.4 11 13 16.3 20.3 dBm 5 10 15 20 22 23 24 25 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 dB 7.9 9.6 11 11.6 11 10 7.7 4.7 mA 13 22 39 70 93 109 137 180 % 8.11 15.15 27.03 47.62 56.81 61.02 61.12 58.56 Vc=3.6V, Icq=5mA, Vbb=1.04V Vc=3V, Icq=5mA,Vb=1.05V Pin Pout Pout Gain It Eff Pin Pout Pout Gain It Eff dBm -5.6 -1.7 2.6 7.23 9.3 10.7 12.4 14.8 18.3 dBm 5 10 15 20 22 23 24 25 26 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 398.11 dB 10.6 11.7 12.4 12.77 12.7 12.3 11.6 10.2 7.7 mA 16 26 43 74 94 107 124 150 188 % 5.65 10.99 21.01 38.61 48.17 53.28 57.88 60.23 60.50 dBm -5.6 -1.4 2.9 7.6 10.3 12.2 15.1 19.6 dBm 5 10 15 20 22 23 24 25 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 dB 10.6 11.4 12.1 12.4 11.7 10.8 8.9 5.4 mA 16 25 42 74 96 114 144 187 % 6.59 13.33 25.10 45.05 55.03 58.34 58.15 56.37 Vc=3.6V, Icq=10mA, Vbb=1.11V Vc=3V, Icq=10mA, Vb=1.1V Pin Pout Pout Gain It Eff Pin Pout Pout Gain Ic Eff dBm -7.1 -2.5 2.06 6.92 9.1 10.55 12.2 14.5 18.2 dBm 5 10 15 20 22 23 24 25 26 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 398.11 dB 12.1 12.5 12.94 13.08 12.9 12.45 11.8 10.5 7.8 mA 20 29 47 77 100 110 127 153 194 % 4.52 9.85 19.22 37.11 45.28 51.82 56.51 59.05 58.63 dBm -6.8 -2.2 2.4 7.4 10 12 14.8 19.4 dBm 5 10 15 20 22 23 24 25 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 dB 11.8 12.2 12.6 12.6 12 11 9.2 5.6 mA 19 27 44 76 99 116 146 193 % 5.55 12.35 23.96 43.86 53.36 57.34 57.35 54.62 Vc=3.6V, Icq=20mA, Vbb=1.16V Pout Pout Gain It Eff Pin Pout Pout Gain It Eff dBm -7.9 -3.1 1.7 6.7 8.9 10.28 12.1 14.4 17.9 dBm 5 10 15 20 22 23 24 25 26 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 398.11 dB 12.9 13.1 13.3 13.3 13.1 12.72 11.9 10.6 8.1 mA 28 33 49 80 98 110 129 156 196 % 3.23 8.66 18.44 35.71 46.21 51.82 55.63 57.92 58.03 dBm -8 -3 1.9 7.2 9.8 11.8 14.5 19.2 dBm 5 10 15 20 22 23 24 25 mWatt 3.16 10.00 31.62 100.00 158.49 199.53 251.19 316.23 dB 13 13 13.1 12.8 12.2 11.2 9.5 5.8 mA 27 33 49 80 101 119 149 194 % 3.90 10.10 21.51 41.67 52.31 55.89 56.19 54.33 It=Ic+Ib, total current draw. 5 Vc=3V, Icq=20mA, Vb=1.18V Pin Philips Semiconductors 1880 MHz PA Driver with BFG21W CW Efficiency vs. Pout, BFG21W CW @ 3.6V Efficiency (%) Gain (dB) Gain vs. Pout, BFG21W CW @ 3.6V 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 5 7 9 11 13 15 17 19 21 23 25 65.00 60.00 55.00 50.00 45.00 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 27 5 7 9 11 13 Pout (dBm) Icq=1mA Icq=5mA Icq=10mA Icq=20mA Icq=1mA 19 21 23 25 27 Icq=5mA Icq=10mA Icq=20mA 65.00 60.00 55.00 50.00 45.00 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 5 7 9 11 13 15 17 19 21 23 25 27 5 7 9 11 13 Pout (dBm) Icq=1mA Icq=5mA Icq=10mA Icq=20mA Icq=1mA Gain vs. Pout, BFG21W CW @ 3.0V and 3.6V 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 17 19 21 23 25 27 25 27 Pout (dBm) Icq=5mA Icq=10mA Icq=20mA Efficiency vs. Pout, BFG21W CW @ 3.6V 65.00 60.00 55.00 50.00 Efficiency (%) Gain (dB) 17 Efficiency vs. Pout, BFG21W CW @ 3.0V 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Efficiency (%) Gain (dB) Gain vs. Pout, BFG21W CW @ 3.0V 45.00 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 5 7 9 11 13 15 17 19 21 Pout (dBm) Icq=10mA @ 3.6V 6 15 Pout (dBm) 23 25 27 5 7 9 11 13 15 17 19 21 Pout (dBm) Icq=10mA, 3V Icq=10mA @ 3.6V Icq=10mA @ 3.0V 23 Philips Semiconductors 1880 MHz PA Driver with BFG21W 2 TONE BFG21W under 2Tone at 1880 and 1881 MHz and 25 deg. C Vc=3.6V, Icq=10mA, Vbb=1.1V Pin Pout Pout dBm dBm mWatt -7.4 5 3.16 -2.8 10 10.00 1.9 15 31.62 3.9 17 50.12 6.1 19 79.43 7.23 20 100.00 8.66 21 125.89 Gain dB 12.4 12.8 13.1 13.1 12.9 12.77 12.34 3rd low dBc -40 -37 -36 -34.7 -30.7 -26.5 -22 3rd high dBc -40 -40.8 -39 -37.3 -32.5 -27 -22 5th low dBc -57 -52 -48 -45 -38 -34.6 -27 5th high dBc -57 -63 -52 -45 -39 -34.2 -28 It mA 16.3 27 42 51 64 71 81 Eff % 5.39 10.29 20.91 27.30 34.48 39.12 43.17 Vc=3.6V, Icq=20mA, Vbb=1.16V Pin Pout Pout dBm dBm mWatt -8.3 5 3.16 -3.4 10 10.00 1.45 15 31.62 3.5 17 50.12 5.8 19 79.43 7 20 100.00 8.43 21 125.89 Gain dB 13.3 13.4 13.55 13.5 13.2 13 12.57 3rd low dBc -46 -40 -35 -32 -28.9 -25 -21 3rd high dBc -53 -49 -58 -48 -35 -29 -23 5th low dBc -60 -58 -50 -46 -41 -36 -29 5th high dBc -60 -60 -51 -49 -43 -37 -32 It mA 27 34 48 57 69 76 84 Eff % 3.25 8.17 18.30 24.42 31.98 36.55 41.63 Vc=3.0V, Icq=10mA, Vbb=1.1V Pin Pout Pout dBm dBm mWatt -7 5 3.16 -2.5 10 10.00 2.2 15 31.62 4.3 17 50.12 6.9 19 79.43 8.6 20 100.00 10.8 21 125.89 Gain dB 12 12.5 12.8 12.7 12.1 11.4 10.2 3rd low dBc -38 -36 -34 -33 -24 -21 -16 3rd high dBc -39 -37 -35 -31 -23 -18 -16 5th low dBc -56 -51 -45 -39 -29 -24 -20 5th high dBc -55 -54 -42 -37 -29 -25 -20 It mA 16 26 41 51 64 74 90 Eff % 5.65 10.99 22.04 28.08 35.46 38.61 39.97 Vc=3.0V, Icq=20mA, Vbb=1.17V Pin Pout Pout dBm dBm mWatt -8.2 5 3.16 -3.2 10 10.00 1.7 15 31.62 4 17 50.12 6.55 19 79.43 8.26 20 100.00 10.44 21 125.89 Gain dB 13.2 13.2 13.3 13 12.45 11.74 10.56 3rd low dBc -45 -38 -33 -30.5 -24 -20 -15 3rd high dBc -55 -55 -43 -36 -25 -19 -15 5th low dBc -60 -60 -46 -42 -33 -26 -20 5th high dBc -60 -59 -52 -47 -35 -29 -22 It mA 27 33 47 56 68 78 93 Eff % 3.35 8.66 19.22 25.57 33.38 36.63 38.68 It=Ic+Ib, total current draw. 7 Philips Semiconductors 1880 MHz PA Driver with BFG21W 2 TONE Gain vs. Pout, BFG21W 2 Tone @ 3.6V Efficiency vs. Pout, BFG21W 2 Tone @ 3.6V 45.00 40.00 35.00 14 13.5 13 12.5 Efficiency (%) Gain (dB) 15 14.5 12 11.5 11 10.5 30.00 25.00 20.00 15.00 10.00 5.00 10 5 7 9 11 13 15 17 19 21 0.00 Avg. 2T Pout (dBm) 5 7 9 11 13 15 17 19 21 19 21 Avg. 2T Pout (dBm) Icq=20mA Icq=10mA Icq=10mA Gain vs. Pout, BFG21W 2 Tone @ 3.0V Efficiency vs. Pout, BFG21W 2 Tone @ 3.0V 15 45.00 14.5 40.00 14 35.00 Efficiency (%) Gain (dB) 13.5 13 12.5 12 11.5 30.00 25.00 20.00 15.00 11 10.00 10.5 5.00 10 0.00 5 7 9 11 13 15 17 19 21 5 9 11 9 11 15 Icq=10mA Icq=10mA Icq=20mA 13 15 17 19 5 -15 -20 -20 -25 -25 -30 -30 -35 -40 -45 17 Icq=20mA Linearity vs. Pout, BFG21W 2 Tone @ 3.0V, 20mA 21 -15 7.5 10 12.5 15 17.5 -35 -40 -45 -50 -50 -55 -55 -60 -60 -65 -65 Avg. 2T Pout (dBm) Avg. 2T Pout (dBm) 3rd high 8 13 Avg. 2T Pout (dBm) IMD (dBc) IMD (dBc) 7 7 Avg. 2T Pout (dBm) Linearity vs. Pout, BFG21W 2 Tone @ 3.6V, 20mA 5 Icq=20mA 3rd low 5th low 5th high 3rd high 3rd low 5th low 5th high 20 22.5 Philips Semiconductors 1880 MHz PA Driver with BFG21W TDMA BFG21W under TDMA at 1880 MHz and 25 deg. C Vc=3.6V, Icq=10mA, Vbb=1.1V Pin Pout Pout dBm dBm mWatt -6.9 5 3.16 -2.4 10 10.00 2.6 15 31.62 7 20 100.00 9.4 22 158.49 11 23 199.53 12.8 24 251.19 15.3 25 316.23 Gain dB 11.9 12.4 12.4 13 12.6 12 11.2 9.7 ACPR low dB -36 -36 -36 -35 -30 -26.7 -24.4 -22 ACPR high dB -36 -36 -36 -36 -30 -27 -24 -22 1st ALT low dB -72 -66 -62 -56 -49 -51 -47 -39 1st ALT high dB -72 -67 -62 -56 -49 -51 -47 -39 2nd ALT low dB -77 -76 -75 -71 -64 -57 -56 -55 2nd ALT high dB -77 -76 -76 -72 -64 -57 -56 -55 It mA 19 27 43 74 95 110 129 154 Eff % 4.62 10.29 20.43 37.54 46.34 50.39 54.09 57.04 Vc=3.6V, Icq=20mA, Vbb=1.16V Pin Pout Pout dBm dBm mWatt -8 5 3.16 -3.1 10 10.00 1.7 15 31.62 6.7 20 100.00 9.2 22 158.49 10.7 23 199.53 12.6 24 251.19 15.1 25 316.23 Gain dB 13 13.1 13.3 13.3 12.8 12.3 11.4 9.9 ACPR low dB -36 -36 -36 -35 -29 -27 -24 -22 ACPR high dB -36 -36 -36 -34 -29 -27 -24 -22 1st ALT low dB -74 -72 -65 -58 -50 -52 -46.8 -39 1st ALT high dB -74 -72 -65 -58 -50 -52 -46.6 -39 2nd ALT low dB -78 -77 -78 -72 -62 -58 -57 -56 2nd ALT high dB -78 -77 -78 -72 -62 -59 -57 -56 It mA 28 34 49 78 98 111 130 160 Eff % 3.14 8.17 17.93 35.61 44.92 49.93 53.67 54.90 Vc=3.0V, Icq=10mA, Vbb=1.11V Pin Pout Pout dBm dBm mWatt -6.7 5 3.16 -2.2 10 10.00 2.4 15 31.62 7.6 20 100.00 10.7 22 158.49 12.7 23 199.53 15.8 24 251.19 20 25 316.23 Gain dB 11.7 12.2 12.6 12.4 11.3 10.3 8.2 5 ACPR low dB -36 -35 -36 -31 -25.2 -23.4 -22 -20 ACPR high dB -36 -35 -35 -31 -25.4 -23.2 -22 -20 1st ALT low dB -72 -66 -62 -50.1 -49 -43 -36 -32 1st ALT high dB -73 -66 -62 -50 -49 -43 -36 -32 2nd ALT low dB -78 -75 -75 -68 -56 -56 -52 -42 2nd ALT high dB -78 -76 -75 -69 -56 -56 -51 -42 It mA 19 27 43 76 100 119 150 193 Eff % 5.55 12.35 24.51 43.86 52.83 55.89 55.82 54.62 Vc=3.0V, Icq=20mA, Vbb=1.17V Pin Pout Pout dBm dBm mWatt -7.9 5 3.16 -3 10 10.00 1.9 15 31.62 7.3 20 100.00 10.4 22 158.49 12.6 23 199.53 15.4 24 251.19 19.9 25 316.23 Gain dB 12.9 13 13.1 12.7 11.6 10.4 8.6 5.1 ACPR low dB -36 -35 -36 -32 -25 -22.6 -21 -20 ACPR high dB -36 -36 -34 -32 -25 -22 -20.9 -20 1st ALT low dB -62 -70 -64 -53 -50 -42 -35.6 -32 1st ALT high dB -62 -71 -64 -52 -51 -42 -35.2 -32 2nd ALT low dB -72 -76 -77 -68 -57 -55.9 -51 -42 2nd ALT high dB -75 -76 -77 -69 -57 -55.8 -51 -42 It mA 27 34 48 78 102 122 152 197 Eff % 3.90 9.80 21.96 42.74 51.79 54.52 55.09 53.51 It=Ic+Ib, total current draw. 9 Philips Semiconductors 1880 MHz PA Driver with BFG21W TDMA Gain vs. Pout, BFG21W TDMA @ 3.6V Efficiency vs. Pout, BFG21W TDMA @ 3.6V 60.00 14 55.00 50.00 13 45.00 12 40.00 Efficiency (%) Gain (dB) 15 11 10 9 35.00 30.00 25.00 8 20.00 7 15.00 10.00 6 5.00 5 5 7.5 10 12.5 15 17.5 20 22.5 0.00 25 5 Pout (dBm) Icq=20mA 7.5 12.5 Icq=10mA Icq=10mA 14 55.00 13 50.00 12 45.00 40.00 Efficiency (%) 60.00 11 10 9 20 22.5 25 Icq=20mA 35.00 30.00 25.00 20.00 15.00 7 10.00 6 5.00 5 0.00 5 7.5 10 12.5 15 17.5 20 22.5 25 5 7.5 10 12.5 Pout (dBm) Icq=10mA 7.5 10 12.5 15 17.5 20 22.5 25 22.5 25 Pout (dBm) Icq=20mA Icq=10mA Linearity vs. Pout, BFG21W TDMA @ 3.6V, 20mA 5 15 17.5 20 Icq=20mA Linearity vs. Pout, BFG21W TDMA @ 3.0V, 20mA 22.5 -20 -25 -30 -35 -40 -45 -50 -55 -60 -65 -70 -75 -80 -85 25 5 ACPR,1st and 2nd ALT (dB) ACPR,1st and 2nd ALT (dB) 17.5 Efficiency vs. Pout, BFG21W TDMA @ 3.0V 15 8 7.5 10 12.5 15 17.5 20 -20 -25 -30 -35 -40 -45 -50 -55 -60 -65 -70 -75 -80 Avg Pout (dBm) ACPR high 2nd ALT low 10 15 Pout (dBm) Gain vs. Pout, BFG21W TDMA @ 3.0V Gain (dB) 10 ACPR low 2nd ALT high 1st ALT low Avg Pout (dBm) 1st ALT high ACPR high 2nd ALT low ACPR low 2nd ALT high 1st ALT low 1st ALT high Philips Semiconductors 1880 MHz PA Driver with BFG21W CDMA BFG21W under CDMA at 1.88GHz and 25 deg. C Vc=3.6V, Icq=10mA, Vbb=1.07V Pin Pout Pout dBm dBm mWatt -6.7 5 3.16 -2.3 10 10.00 2.3 15 31.62 5 18 63.10 7.1 20 100.00 8.23 21 125.89 9.6 22 158.49 Gain dB 11.7 12.3 12.7 13 12.9 12.77 12.4 ACPR low dB -58 -57 -58 -56 -49 -45 -41 ACPR high dB -58 -58 -62 -58 -49 -45 -42 It mA 17 26 42 58 73 82 94 Eff % 5.17 10.68 20.91 30.22 38.05 42.65 46.83 Vc=3.6V, Icq=20mA, Vbb=1.15V Pin Pout Pout dBm dBm mWatt -8.2 5 3.16 -3.4 10 10.00 1.4 15 31.62 4.5 18 63.10 6.7 20 100.00 7.9 21 125.89 9.2 22 158.49 Gain dB 13.2 13.4 13.6 13.5 13.3 13.1 12.8 ACPR low dB -73 -70 -73 -61 -49 -45 -42 ACPR high dB -67 -62 -57 -54 -48 -45 -41 It mA 27 33 48 63 78 88 98 Eff % 3.25 8.42 18.30 27.82 35.61 39.74 44.92 Vc=3.0V, Icq=10mA, Vbb=1.11V Pin Pout Pout dBm dBm mWatt -6.7 5 3.16 -2.4 10 10.00 2.3 15 31.62 5.3 18 63.10 7.7 20 100.00 9.12 21 125.89 10.9 22 158.49 Gain dB 11.7 12.4 12.7 12.7 12.3 11.88 11.1 ACPR low dB -62 -59 -58 -50 -43 -40 -37 ACPR high dB -65 -59 -60 -51 -43 -40 -38 It mA 19 27 43 59 75 85 101 Eff % 5.55 12.35 24.51 35.65 44.44 49.37 52.31 Vc=3.0V, Icq=20mA, Vbb=1.17V Pin Pout Pout dBm dBm mWatt -8 5 3.16 -3.2 10 10.00 1.77 15 31.62 4.9 18 63.10 7.4 20 100.00 8.85 21 125.89 10.7 22 158.49 Gain dB 13 13.2 13.23 13.1 12.6 12.15 11.3 ACPR low dB -74 -75 -65 -51 -43 -40 -37 ACPR high dB -66 -60 -55 -50 -43 -40 -38 It mA 28 33 48 63 78 89 104 Eff % 3.76 10.10 21.96 33.38 42.74 47.15 50.80 It=Ic+Ib, total current draw. 11 Philips Semiconductors 1880 MHz PA Driver with BFG21W CDMA Gain vs. Pout, BFG21W CDMA @ 3.6V Efficiency vs. Pout, BFG21W CDMA @ 3.6V 55.00 15 50.00 14.5 45.00 14 40.00 Efficiency (%) Gain (dB) 13.5 13 12.5 12 11.5 35.00 30.00 25.00 20.00 15.00 11 10.00 10.5 5.00 10 4 6 8 10 12 14 16 18 20 0.00 22 4 Pout (dBm) Icq=10mA 6 10 Icq=20mA 16 18 20 22 20 22 20 22 Icq=20mA Efficiency vs. Pout, BFG21W CDMA @ 3.0V 55.00 14.5 50.00 14 45.00 13.5 40.00 Efficiency (%) 15 13 12.5 12 35.00 30.00 25.00 20.00 15.00 11 10.00 10.5 5.00 10 0.00 4 6 8 10 12 14 16 18 20 22 4 6 8 10 Pout (dBm) Icq=10mA 6 8 10 12 12 14 16 Icq=20mA Icq=10mA 14 16 18 22 4 -35 -35 -40 -40 ACPR,1st ALT (dB) -30 -45 -50 -55 -60 -65 6 8 10 12 14 16 -45 -50 -55 -60 -65 -70 -70 -75 -75 -80 Icq=20mA Linearity vs. Pout, BFG21W CDMA @ 3.0V, 20mA 20 -30 -80 Avg Pout (dBm) ACPR high 18 Pout (dBm) Linearity vs. Pout, BFG21W CDMA @ 3.6V, 20mA 4 ACPR,1st ALT (dB) 14 Icq=10mA 11.5 12 12 Pout (dBm) Gain vs. Pout, BFG21W CDMA @ 3.0V Gain (dB) 8 ACPR low Avg Pout (dBm) ACPR high ACPR low 18 Philips Semiconductors APPENDIX 1: Part list for BFG21W 1880 MHz PA driver Resistors R1 100 Ω Leaded wirewound, 0.1W. R2 5.1 Ω Philips 0805, 0.1W metal film resistor. R3 30 Ω Philips 0805, 0.1W metal film resistor. R4 10 Ω Philips 0805, 0.1W metal film resistor. Capacitors C1,C5 24 pF ATC100A, DC blocking capacitor C2 3.0 pF ATC100A, matching capacitor C3,C6 13 pF C4 2.4 pF ATC100A, bias and supply decoupling capacitor. ATC100A, matching capacitor C7 1.0 nF ATC100A, supply low frequency decoupling capacitor. Transistors T1 BFG21W RF amplifying transistor. Q1 PMBT3904 Biasing and thermal tracking small signal transistor. 13 1880 MHz PA Driver with BFG21W Philips Semiconductors 1880 MHz PA Driver with BFG21W APPENDIX 2: Spice parameters of the BFG21W .SUBCKT BFG21W 10 11 12 Lbbond 2 5 7.209E-10 Lblead 5 8 2.251E-10 Lbfoot 8 11 1.1E-10 Cbfoot 8 12 1.17E-13 Lebond 3 6 5.15E-11 Lelead 6 9 6.914E-11 Lefoot 9 12 1.739E-10 Cefoot 9 12 1.95E-13 Lcbond 1 4 5.711E-10 Lclead 4 7 2.251E-10 Lcfoot 7 10 1.1E-10 Ccfoot 7 12 1.17E-13 Cbc 5 4 2E-15 Cbe 5 6 8E-14 Cce 4 6 8E-14 Cbpb 2 14 3.3E-13 Cbpc 1 13 3.47E-13 Cmet 1 3 1.7E-12 Rsub1 14 15 249.2 Rsub2 13 15 464.4 Rmut 3 15 100 Dio 16 1 + D1 Rs 15 16 3.5 .MODEL D1 D + IS = 4.99E-13 + N = 1.189 14 Q1 1 2 3 3 NPN + AREA = 1 .MODEL NPN NPN + IS = 3.835E-16 + BF = 92 + NF = 1 + VAF = 35 + IKF = 2.8 + ISE = 9.005E-13 + NE = 2.262 + BR = 8.9 + NR = 1.009 + VAR = 2.25 + IKR = 0.6507 + ISC = 2.503E-15 + NC = 1.209 + RB = 1.492 + IRB = 0 + RBM = 0.3202 + RE = 0.3429 + RC = 0.8 + CJE = 3.026E-12 + VJE = 0.9 + MJE = 0.2861 + CJC = 1.041E-12 + VJC = 0.6964 + MJC = 0.308 + CJS = 1.844E-12 + VJS = 0.4237 + MJS = 0.2606 + XCJC = 0.5 + TR = 1.5E-10 + TF = 5.05E-12 + XTF = 74 + VTF = 0.8 + ITF = 6.5 + PTF = 0 + FC = 0.875 + EG = 1.11 + XTI = 4.3 + XTB = 0.5 .END