. e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT DESCRIPTION The M65845AFP is a CMOS IC built-in Digital Echo function with microphone peripheral circuits for "Karaoke" equipment packed in a single chip. It is suitable for "Karaoke" equipments such as Video CD Player,Mini Stereo, CD-Radio cassette,TV or VCR. Being pin compatible with the M65845FP,the M65845AFP is suitable for upgrading the series. PIN CONFIGURATION FEATURES 36 VOCAL CUT FILTER MIC1 INPUT 1 ALC SUPPLY VOLTAGE CONTROL 35 MIC1 NF INPUT 3 34 AUDIO SW2 MIC1 OUTPUT 4 33 AUDIO SW1 MIC1 VOLUME INPUT 5 MIC2 INPUT 6 ALC2 CONTROL 7 MIC2 NF INPUT 8 MIC2 OUTPUT 9 MIC2 VOLUME INPUT 10 MIC OUTPUT 11 LOWPASS FILTER1 INPUT 12 LOWPASS FILTER1 OUTPUT 13 A/D INTEGRAL INPUT 14 M65845AFP •High performance digital echo circuit thanks to 16Kbit memory •Two microphone-mixing lines,vocal cut circuit,digital echo, and line-mixing amplifier are contained,enabling singlechip package of microphone peripheral circuit of "Karaoke" equipment. •ALC-equipped microphone amplifiers permit excessively high-input. ALC operating voltage can be set as desired. •Vocal cut circuit of complete stereo construction •Compatibility with the M65845FP •Built-in current-control oscillation circuit •Built-in automatic reset circuit activated with power on •Single power supply (5V) ALC1 CONTROL 2 32 CLOCK CONT 31 MIC SW 30 MICECHO OUTPUT 29 Lch LINE OUTPUT 28 Rch LINE OUTPUT 27 Lch LINE INPUT 26 Rch LINE INPUT 25 ECHO VOLUME INPUT 24 LOWPASS FILTER2 OUTPUT 23 LOWPASS FILTER2 INPUT A/D INTEGRAL OUTPUT 15 22 D/A INTEGRAL OUTPUT A/D CONTROL 16 21 D/A INTEGRAL INPUT REFERENCE 17 20 D/A CONTROL GND 18 19 POWER SUPPLY 36P2R RECOMMENDED OPERATING CONDITION Supply voltage range••••••••••Vcc=4.5~5.5V Rated supply voltage•••••••••• Vcc=5V SYSTEM CONFIGURATION AUDIO SW Lch INPUT SOURCE SELECTOR MIX L Lch OUTPUT R VOCAL CUT MIX Rch INPUT Rch OUTPUT ALC MIC1 MIC VOL MIC SW MIX DIGITAL ECHO ALC MIC2 MIX MIC MIC VOL VOL ECHO VOL MITSUBISHI ELECTRIC ( 1 / 15 ) 6 8 9 7 10 MIC2IN MIC2NFIN MIC2OUT ALC2 MIC2 VOLIN ALC MITSUBISHI ELECTRIC 12 MIC LPF1 OUT IN 11 A/D D/A REF LPF2 18 MICECHO OUT 30 MIC SW 31 28 Rout 29 Lout 25 13 16 14 15 20 21 22 23 24 LPF1 DAINTOUT DACON LPF2OUT ECHOVOLIN ADINTIN OUT LPF2IN DAINTIN ADCONT ADINTOUTT REF LPF1 LOGIC 16KRAM 19 GND M Inot a finsaare subje I L R E is is limit 5 ALC CLOCK GENERATOR 1/2Vcc 17 32 Vcc . MIC1 VOLIN ALC1 2 4 3 MIC1NFIN AUDIO SOURCE CONTROL 36 REF CLOCK CONT . MIC1OUT 1 MIC1IN VALL 35 Rin 26 Lin 27 34 VCFIL ric ; Th ice aramet t o N ep som 33 AUDSW2 P AUDSW1 e ion Y icat o chang f R i c e N A l sp ct t MITSUBISHI SOUND PROCESSOR ICs M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT IC INTERNAL BLOCK DIAGRAM ( 2 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT PIN DESCRIPTION No Symbol Pin Name 1 MIC1IN 2 ALC1 3 MIC1NFIN MIC1 NF INPUT 4 MIC1OUT MIC1 OUTPUT 5 MIC1VOLIN MIC1 VOLUME INPUT 6 MIC2IN MIC2 INPUT 7 ALC2 ALC2 CONTROL 8 MIC2NFIN MIC2 NF INPUT 9 MIC2OUT MIC2 OUTPUT MIC1 INPUT ALC1 CONTROL Function Connect MIC1 Connect C which determine recovery time Set up MIC1 amp gain for feedback circuit Connect microphone volume which turn down input signal Connect MIC 2 Connect C which determine ALC attack ,recovery time Forms MIC 2 amp gain with feedback 10 MIC2VOLIN MIC2 VOLUME INPUT 11 MICOUT 12 LPF1 IN LOWPASS FILTER1 INPUT 13 LPF1 OUT LOWPASS FILTER1 OUTPUT 14 ADINTIN A/D INTEGRAL INPUT MIC OUTPUT Connect microphone volume which turn down input signal Mixing output with MIC 1 and MIC 2 Forms the front lowpass filter with external CR for digital echo Forms integrator with external C and R 15 ADINTOUT A/D INTEGRAL OUTPUT 16 ADCONT A/D CONTROL ADM A/D adaptive control 17 REF REFERENCE 1/2Vcc, connect filter C 18 GND GND 19 VCC POWER SUPPLY 20 DACONT D/A CONTROL ADM A/D adaptive control MITSUBISHI ELECTRIC ( 3 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT No Symbol 21 DAINTIN Pin name Function D/A INTEGRAL INPUT Forms integrator with external C D/A INTEGRAL OUTPUT 22 DAINTOUT 23 LPF2 IN 24 LPF2 OUT 25 ECHOVOLIN ECHO VOLUME INPUT 26 RLINEIN Rch LINE INPUT 27 LLINEIN Lch LINE INPUT 28 RLINEOUT LOWPASS FILTER'2 INPUT LOWPASS FILTER2 OUTPUT Forms post lowpass filter with external CR for digital echo Connect microphone volume which turn down input signal Rch LINE OUTPUT Mixing output with line and microphone 29 LLINEOUT Lch LINE OUTPUT 30 MICECHOOUT MIC ECHO OUTPUT 31 MICSW 32 CLOCK CONT 33 AUDSW1 MIC SW Mixing output with microphone and echo L; Microphone OFF H; Microphone ON CLOCK CONTROL Controls built-in clock generation circuit with external R AUDIO SW1 Changing source sound signal 34 AUDSW2 35 VALC ALC SUPPLY VOLTAGE CONTROL Forms ALC operation voltage with control voltage 36 VCFIL VOCAL CUT FILTER Through frequency under vocal level AUDIO SW2 MITSUBISHI ELECTRIC ( 4 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25°C,unless otherwise noted) Symbol Parameter Vcc Supply voltage Icc Vi Circuit current Conditions Unit Rations V 6.0 85 Input voltage Pd Power dissipation Topr Operating temperature Tstg Storage temperature mA -0.3~Vcc+0.3 V 860 -20~+75 -40~+125 mW °C °C RECOMMENDED OPERATING CONDITION Symbol Parameter Vcc Supply voltage ViL L input voltage ViH H input voltage Conditions 33,34PIN MITSUBISHI ELECTRIC Min Limits Typ 4.5 5 Max Unit 0 5.5 1 V 4 Vcc V V ( 5 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT ELECTRICAL CHARACTERISTICS (Vcc=5V,f=1kHz,Vi=100mVrms,fck=2MHz,Ta=25°C ,unless otherwise noted) Limits Symbol VOCAL CUT LINE ECHO MICROPHONE AMPLIFIER T/L Parameter Conditions Icc Circuit current No signal GVO Voltage gain Vo=-17dBV Min Typ Max Unit 25 44 34 70 mA 47 50 dB THD1 Distortion1 THD2 Distortion2 Vo=-17dBV,without ALC 0.5 1.5 % Vi=-27dBV,ALC operate 3.0 6.0 % VoALC ALC voltage at -10 ~ +3dBV -3 0 +3 TALCAT ALC Attack time at C=4.7µF TALCRE ALC Recovery time at C=4.7µF 25 1.0 40 1.5 55 2.0 dB ms -1 2 VoMAX Maximum output voltage THD=10% No Noise Voltage Zi Td input impedance Gv Voltage gain THD Distortion VoMAX Maximum output voltage THD=10% No Noise voltage JIS-A Gv Voltage gain THD Distortion VoMAX Maximum output voltage THD=10% No Noise voltage JIS-A,MICSW=off Zi No Input impedance Noise voltage JIS-A,Vocal cut ON Gv Voltage gain input one side channel VoMAX Maximum output voltage THD=10% GREJ Vocal rejection ratio Delay Time dBV 5 -57 20 167 197 226 ms -3.0 0 3.0 2.0 4.0 dB % -3 1.0 -3 -82 0 -67 +3 0.02 0.1 1 4 -97 kΩ dBV dBV dB % dBV 20 -88 40 dBV kΩ -95 -72 dBV -3 1 0 +3 4 dB dBV 14 18 dB 10 MITSUBISHI ELECTRIC dBV -68 10 Gv=47dB,JIS-A,VI=0Vrms Rc=51kΩ s ( 6 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT FUNCTION DESCRIPTION (1) Microphone amplifier The gain(Gv) and low cut-off frequency(fcl) of microphone amplifier are expressed as follows. REF R1+1.5K+334K fcl= 1 Gv=20log• 2π•(R1+1.5K)•C1 R1+1.5K 10kΩ(typ) 1µF MIC Gv(max)=47dB,fcl=50Hz R1=0Ω,C1=2.2µF 2 5kΩ 334kΩ Assuming Gv=37dB, fcl=15Hz,for instance, the constants take the following values. 1.5kΩ 3 R1=3.3KΩ,C1=2.2µF 4 R1 C1 << Attention point when M65845FP is replaced with M65845AFP >> REF R3 and C4 are required for the M65845FP, not for the M65845AFP. As mentioned above, the gain of microphone amplifier can set it up with R1. 10kΩ(typ) 1µF MIC 2 R2 3 C4 R3 and C4 are not required for the M65845AFP. R1 for the gain of microphone amplifier setting in use M65845AFP 4 R3 R1 C1 Recommended circuit In use M65845FP MITSUBISHI ELECTRIC ( 7 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (2) ALC level block diagram vo(dBV) 10 ALC supply voltage control limits +3 0 -10 -20 It is set 47dB for microphone amplifier gain. -30 -60 -50 -40 -30 -20 -10 vi(dBV) (3) ALC operation voltage control ALC operation voltage can be formed within the limits of -10 to +3 dBV controlled by DC control voltage which connect 35 pin. (Setting up forms) 2.5V( 12 Vcc) internal direct bias half peak voltage Vpo 35 pin control voltage VALC 0V When ALC operation voltage is -5dBV (at Vcc=5V) VALC= 12 Vcc-Vpo -5dBV=0.56Vrms=1.59Vp-p=0.80Vp-o VALC=2.5-0.8=1.7V are concerned. MITSUBISHI ELECTRIC ( 8 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT Input impedance to 35 pin is so high (1MΩ) that ALC base voltage can be determined by division resistance. Vcc R17(51k) 35 R16 C33(0.01µ ) at Vcc=5V ALC operation voltage (dBV) 35 pin control voltage VALC (V) resistance R16 (Ω) +3 0.50 5.6k 0 1.09 15k -2 1.38 20k -4 1.61 24k -6 1.79 27k -8 1.94 33k -10 2.05 36k (4) MIC SW Input low level to 31 pin (MIC SW) ,then microphone and echo signal can be cut. ECHO SIGNAL OUTPUT 31 pin (MIC SW) MIC SW H or OPEN ON ON L OFF MUTE MITSUBISHI ELECTRIC ( 9 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (5) Audio source select Changing the switch ,sound source changes four patterns matching with KARAOKE soft. 33 AUDSW1;D1 34 AUDSW2;D2 L L H H L H L H Movements Stereo Lch monaural Rch monaural vocal cut 1 Stereo Under the conditions usual 2channels are played back to each outputs. 2 Lch monaural Under the conditions Lch source is played back to 2ch outputs and suitable for KARAOKE reproduction of multiple KARAOKE soft and main sound reproduction of laser disks. 3 Rch monaural Under the conditions Rch source is played back to 2ch outputs and suitable for reference vocal reproduction of multiple KARAOKE soft and sub sound reproduction of laser disks. MITSUBISHI ELECTRIC ( 10 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT 4 Vocal cut It is a method turned down Lch and Rch input having the same phase and sound . Lowpass cut off frequency fc is determined by a capacitance which connect to 36 pin (vocal cut filter). It is also having a function which through frequency under vocal level for supplying a lack of low level sound. Rvc=20k typ 36 C34 fc= 1 2πRvcC34 at fc=50Hz, C34=0.15µF is determined. Caution; Inside resistance is changeable one by one which rate is ±30%. MITSUBISHI ELECTRIC ( 11 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (6) Digital Echo 1 Clock oscillator circuit This IC incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by connecting an Rc for current control pin 32 (CLOCK CONT). Fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit. The oscillator frequency fck is following. fck = 2 MHz(Rc=51KΩ) Rc DC Current Clock oscillator circuit 32 Clock frequency:fck Note: The delay time(Td) for echo is determined by the clock frequency(fck). Delay time=1/fckX24XN (N=the number of memory bits = 16384 fck = 2 MHz(Rc=51KΩ) : Delay time=197msec fck = 2.6MHz(Rc=39KΩ) : Delay time=150msec fck = 3.9MHz(Rc=24KΩ) : Delay time=100msec 2Å@Auto mute function The IC carries out auto mute function at the time of powering up and switching on MIC SW in order to suppress shock noise that the digital delay may produce. •At power up Reset Time Mute time (400msec) •At switching on MIC SW MIC SW OFF Mute time (400msec) switching on MIC SW MITSUBISHI ELECTRIC ( 12 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT 3 Input and output LPF Signal through frequency fsig is also determined by LPF of Digital Echo cut off frequency. 2 degree LPF of Digital Echo is formed by external resistance and capacitor . (refer to next figure) So, cut off frequency is determined by next formula. 1 fsig= 2π R8 • R9 • C13 • C14 LPF1 LPF2 REF REF 12 R7 24kΩ 23 13 R8 C14 24kΩ C13 R7 24kΩ R9 24kΩ MITSUBISHI ELECTRIC 24 R8 C14 24kΩ C13 R9 24kΩ ( 13 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT COMPATIBILITY WITH M65845FP <APPLICATION EXAMPLE IN USE M65845FP> 5k 0.15µ *2 0.22µ MIC1 1 VCFIL 36 MICIN 4.7µ 2.2k *2 *1 3 MIC1NFIN 200p 150k 30kΩ *1 200p *1 9 MIC2OUT 0.1µ *2 0.1µ 10 MIC2VOLIN 30kΩ *2 0.027µ ALC2 8 MIC2NFIN 150k *2 10k *2 11 MICOUT 15k 12 LPF1IN 15k 2700p 13 LPF1OUT 30 *1 15 ADINTOUT *2 VCC 100p MIC SW MICECHO 30 OUT *1 2.2µ LLINEOUT 29 Lout 2.2µ RLINEOUT 28 Rout 1µ LLINEIN 27 Lin 1µ RLINEIN 26 Rin 0.1µ ECHO VOLIN 25 *2 30kΩ *2 *1 3k LPF2OUT 24 0.047µ 0.1µ *1 15k 2700p LPF2IN 23 14 ADINTIN 0.068µ D1 MICSW 31 7 2.2k AUDSW1 33 6 MIC2IN M65845AFP *2 0.33µ D2 CLOCK 32 4.7µ VCC 24k AUDSW2 34 5 MIC1VOLIN *2 0.22µ 51k 39k 0.1µ 5k MIC2 *1 4 MIC1OUT 0.1µ *2 0.01µ VALC 35 2 ALC1 0.33µ Units Resistance :Ω Capacitance:F 0.027µ 10k DAINTOUT 22 16 ADCONT DAINTIN 21 17 REF DACONT 20 18 GND VCC 19 0.22µ 15k *2 0.068µ 0.22µ 47µ 0.1µ VCC 100µ *2 Feed Back 0.15µ 30k As mentioned above, the M65845AFP can be replaced with the M65845FP without changing the board. Note *1: The components marked with a circle are required for the M65845FP, not for the M65845AFP. *2: The M65845AFP is different from the M65845FP a part of the components marked with a circle. MITSUBISHI ELECTRIC ( 14 / 15 ) . e ion Y icat o chang f R i c e N A l sp ct t P . MITSUBISHI SOUND PROCESSOR ICs M Inot a finsaare subje I L R E is is limit ric ; Th ice aramet t o N ep som M65845AFP DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT APPLICATION EXAMPLE Microphone amplifier : Gv=47dB,fcl=50Hz ALC operating voltage -4dBV ECHO : Delay time 197ms (fs=83.3kHz) Cut-off frecuency 3.1kHz 5k 0.15µ 1µ MIC1 1 VCFIL 36 MICIN VALC 35 2 ALC1 2.2µ AUDSW2 34 D2 4 MIC1OUT AUDSW1 33 D1 1µ 30kΩ 4.7µ 1µ 6 MIC2IN 7 ALC2 2.2µ 8 MIC2NFIN 9 MIC2OUT 1µ 1µ 10 MIC2VOLIN 30kΩ 0.047µ 24k 24k 11 MICOUT 12 LPF1IN 24k 1000p 13 LPF1OUT M65845AFP MIC2 15 ADINTOUT 51k VCC MICSW 31 MIC SW MICECHO OUT 30 2.2µ LLINEOUT 29 Lout 2.2µ RLINEOUT 28 Rout 1µ LLINEIN 27 Lin 1µ RLINEIN 26 ECHO VOLIN 25 Rin 30kΩ 1µ 1µ LPF2OUT 24 24k 1000p LPF2IN 23 14 ADINTIN 0.068µ 24k CLOCK 32 CONT 5 MIC1VOLIN 5k VCC MIC1NFIN 3 1µ 0.01µ 51k 4.7µ 24k DAINTOUT 22 16 ADCONT DAINTIN 21 17 REF DACONT 20 18 GND VCC 19 0.1µ 0.047µ 24k 0.068µ 0.1µ 47µ 0.1µ VCC 100µ Feed Back 0.15µ 50k Units Resistance :Ω Capacitance:F MITSUBISHI ELECTRIC ( 15 / 15 )