n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT DESCRIPTION The M65854 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. FEATURES high input. ALC operating voltage can be set as desired. • 2 microphone volumes and echo effect volume are included amplifiers • Karaoke entertainment functions such as vocal cut and automatic vocal support system • Built-in current-control oscillation circuit PIN CONFIGURATION MCLKCONT 1 42 MIC1VOL MIC1IN 2 41 MIC2VOL ALC1 3 40 ECHOVOL MIC1NFIN 4 MIC1OUT 5 MIC1VOLIN 6 MIC2IN 7 ALC2 8 MIC2NFIN 9 • Stereo microphone-line mixing • Built-in automatic reset circuit activated with power on • The use of AUDIO SW easy to control without Microcomputer • 5V single power supply RECOMMENDED OPERATING CONDITION M 6 5 8 5 4 F P High performance digital echo circuit thanks to 16Kbit memory • Built-in surround function which works Simulated Stereo for monaural source and Stereo Surround for stereo source • ALC-equipped microphone amplifiers permit excessively • MIC2OUT 10 MIC2VOLIN 11 MIC OUT 12 LPF1IN1 13 LPF1IN2 14 LPF1OUT 15 ADINTOUT 16 39 AUDSW5 38 AUDSW4 37 AUDSW3 36 AUDSW2 35 AUDSW1 34 PS2 33 PS1 32 LOUT 31 ROUT 30 VCFIL 29 LIN 28 RIN 27 LPF2OUT 26 LPF2IN2 ADINTIN 17 ADCONT 18 25 LPF2IN1 REF 19 24 DAINTOUT GND 20 23 DAINTIN VCC 21 22 DACONT • Supply voltage range • • • • • • • • • •Vcc = 4.5 ~ 5.5V Rated supply voltage • • • • • • • • • • Vcc = 5V SYSTEM CONFIGURATION Lch INPUT SOURCE SELECTOR MIX Lch OUTPUT MIX Rch OUTPUT L PHASE SHIFTER SURROUND R (L+R)/2 VOCAL CUT Rch INPUT ALC MIC VOL MIC MIX ECHO ALC MIC MIX MIC VOL ECHO VOL FEEDBACK VOL MITSUBISHI ELECTRIC ( 1 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT MIC1VOL MIC2VOL ECHOVOL AUDSW5 AUDSW4 AUDSW3 AUDSW2 AUDSW1 PS2 PS1 LOUT ROUT VCFIL LIN RIN LPF2OUT LPF2IN2 LPF2IN1 DAINTOUT DAINTIN DACONT PIN CONFIGURATION 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 A/D A/D A/D AUDIO SW I/F (L+R) / 2 PHASE SHIFTER L R LPF STEREO D/A 16kSRAM ECHO VOL ECHO F.B(-2dB) MAIN LOGIC MIC VOL MIC VOL MCLK A/D 1/2Vcc 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 MCLKCONT MIC1IN ALC1 MIC1NFIN MIC1OUT MIC1VOLIN MIC2IN ALC2 MIC2NFIN MIC2OUT MIC2VOLIN MICOUT LPF1IN1 LPF1IN2 LPF1OUT ADINTOUT ADINTIN ADCONT REF MITSUBISHI ELECTRIC GND Vcc 21 20 ( VCC 1 GND LPF ALC ALC 2 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT PIN DESCRIPTION Pin No. Symbol Nam I/O 1 MCLKCONT Clock control 2 MIC1IN 3 ALC1 4 MIC1NFIN Microphone 1 negative feedback input I 5 MIC1OUT Microphone 1 input O 6 MIC1VOLIN Microphone 1 volume input I 7 MIC2IN Microphone 2 input I 8 ALC2 9 MIC2NFIN Microphone 2 negative feedback input I 10 MIC2OUT Microphone 2 input O 11 MIC2VOLIN Microphone 2 volume input I 12 MICOUT Microphone output 13 LPF1IN1 Low pass filter 1 input 1 I 14 LPF1IN2 Low pass filter 1 input 2 I 15 LPF1OUT Low pass filter 1output O 16 ADINTOUT A/D integrator output O 17 ADINTIN A/D integrator input I 18 ADCONT A/D control 19 REF Reference power output 20 GND Ground — 21 VCC Power supply — Function Controls built-in clock generation circuit with — external R Microphone 1 input I To connect MIC1 To connect ALC attack / recovery time — setting capacitor ALC1 control To connect low cut-off frequency of MIC1 amplifier setting capacitor To connect capacitor to reduce noise generated at time of volume change To connect MIC2 To connect ALC attack/recovery time — setting capacitor ALC2 control To connect low cut-off frequency of MIC2 amplifier setting capacitor To connect capacitor to reduce noise generated at time of volume change O Mixing output of MIC1 and MIC2 Pre-filter before A/D convertor for digital delay Composes D/A conversion integrator with external capacitor To determine adaptive time constant of — A/D convertor with ADM system — To connect 1/2 Vcc output and filter capacitor MITSUBISHI ELECTRIC ( 3 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som Pin No. 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT Symbol I/O Nam Function To determine adaptive time constant of 22 DACONT D/A control 23 DAINTIN D/A integrator input I 24 DAINTOUT D/A integrator output O 25 LPF2IN1 Low pass filter 2 input 1 I 26 LPF2IN2 Low pass filter 2 input 2 I 27 LPF2OUT Low pass filter 2 output O 28 RIN Rch line input I Rch line input 29 LIN Lch line input I Lch line input 30 VCFIL Vocal cut filter 31 ROUT Rch output O Rch mixing output 32 LOU Lch output O Lch mixing output 33 PS1 Phase shift input 1 I — D/A convertor with ADM system Composes D/A conversion integrator with external capacitor Post-filter after D/A conversion for digital delay — Processes frequencies lower than the vocal band Determines a constant at time of phase shift 34 PS2 35 AUDSW1 Phase shift input 2 I Source selector and Auto vocal support sw I Source selector and Auto vocal support sw : audio signal is selected by setting these switches to L or H 36 AUDSW2 37 AUDSW3 38 AUDSW5 Auto vocal support sw I Auto vocal support sw : ON set to H,OFF set to L 39 AUDSW4 Phase shift sw I Phase shift sw : ON set to H,OFF set to L 40 ECHOVOL Echo effect volume control I Echo effect volume control by DC voltage 41 MIC2VOL MIC2 volume control I MIC2 volume control by DC voltage 42 MIC1VOL MIC1 volume control I MIC1 volume control by DC voltage MITSUBISHI ELECTRIC ( 4 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT ELECTRICAL CHARACTERISTICS ( Vcc=5V,f=1kHz,vi=100mVrms,Ta=25°C Unless otherwise noted ) Limits Mic volume Microphone amplifier TOTAL Symbol Test conditions Min Typ Max — 35 mA 47 dB Unit Icc Circuit current No signal provided Gvo Amplifier gain Vo = -17dBV THD1 Distortion Vo = -17dBV,with ALC not operated — 0.1 0.5 % THD2 Distortion Vi= -37dBV,with ALC operated — 3.0 6.0 % 0 +2 +4 dBV VoALC ALC operating voltage measurement : +2dBV TALCAT ALC attack time C=4.7µF 25 40 55 msec TALCRE ALC recovery time C=4.7µF 1.0 1.5 2.0 sec VoMAX Maximum output voltage THD=10% 1.2 1.3 — Vrms No Output noise voltage — -68 -57 dBV Zi Input impedance 5 10 20 K Gv I/O voltage gain Volume max -3 0 +3 dB ATTmax Maximum attenuation Volume min — -72 -67 dBV THD Distortion Volume max — 0.15 0.30 % ViMAX Maximum input voltage THD=10% 1.3 1.6 — Vrms Output noise voltage JIS - A — -96 -90 dBV Volume max -3 0 +3 dB ATTmax Maximum attenuation Volume min — -72 -67 dBV THD Volume max — 0.15 0.30 % 1.1 1.4 — Vrms — -96 -90 dBV No Echo effect / Echo feed back volume Parameter Gv I/O voltage gain Distortion Gv=47dB,f=100 to 5KHz VoMAX Maximum output voltage THD=10% No Output noise voltage JIS - A MITSUBISHI ELECTRIC ( 5 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som LINE Digital echo Digital echo Symbol Gv 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT Parameter Test conditions I/O voltage gain VoMAX Maximum output voltage THD=10% Min Limits Typ Max Unit -3 0 +3 dB 1.1 1.4 — Vrms Td Delay Time Sets Delay time with microcomputer. THD Distortion Td=196.6mS,30KHzLPF 2.0 2.0 4.0 % No Output noise voltage Vi=0mVrms,JIS - A Td=196.6msec,Rg=620 -67 -82 — dBV Gv I/O voltage gain -3 0 +3 dB THD Distortion 30KHzLPF — 0.02 0.04 % VoMAX Maximum output voltage THD=10% 1.1 1.7 — Vrms -90 -95 — dBV No Output noise voltage JIS - A, MIC1VOLandMIC2VOL=0.0V CS Channel separation Lin=400Hz,Rout JIS - A Zi Input impedance Grej Vocal removal ratio Vocal cut MITSUBISHI ELECTRIC 147.4 196.6 245.7 msec -70 dB 10 20 30 KHz 14 18 — dB ( 6 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT ABSOLUTE MAXIMUM RATINGS Symbol Name Test conditions Ratings Units Vcc Supply voltage 6.0 V Vi Circuit current -0.3 ~ Vcc+0.3 V Pd Input Voltage Operating temperature Storage temperature 1.1 W -20 ~ +75 °C -40 ~ +125 °C Topr Tstg RECOMMENDED OPERATING CONDITION Limits Symbol VDD Parameter Test conditions Digital supply voltage VIL L input level VIH H input level Units Min Typ Max 4.5 5 5.5 V 0 — 0.3VDD V — VDD V 0.7VDD MITSUBISHI ELECTRIC ( 7 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT FUNCTION CONTROL • SOURCE SELECTOR SWITCH Control Data AUDSW3 L AUDSW2 AUDSW1 L L Source select Lch, monaural L L L H H L Rch, monaural L H H Vocal cut H L L Stereo H H H TEST MODE (L+R) / 2 • AUTO VOCAL SUPPORT SWITCH Control Data AUTO VOCAL SUPPORT AUDSW4 Auto vocal support SW OFF L ON H • PHASE SHIFTER SURROUND CONTROL Control Data PHASE SHIFTER SURROUND AUDSW5 Surround SW OFF L ON H • Echo effect volume attenuation • Microphone volume attenuation DC voltage control (V) MIC2VOL(pin41) Attenuation [dB] MIC1VOL(pin42) 5.0 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.0 DC voltage control (V) Attenuation [dB] ECHOVOL(pin40) 5.0 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.0 0 -3 -6 -9 -12 -15 -18 - +3 0 -3 -6 -9 -12 -15 - Note: • Digital echo output control Control Data MIC2VOL MIC1VOL — 0.0 (V) — 0.0 (V) When the MIC1VOL and MIC2VOL are Digital echo output control — at the same time, the Digital echo output control will automatically be the ON OFF Digital echo output off mode. Please use the Digital echo output control for Mic sw. MITSUBISHI ELECTRIC ( 8 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT FUNCTION DESCRIPTION (1) AUTO RESET Settings are reset automatically when the IC is powered up. The reset state is automatically canceled approximately 150msec after powering up(Vcc=5V and the capacitor connected to pin C=100µF). By auto reset, operation mode setting become as follows. •Source Selector : stereo •Phase Shifter Surround Control : OFF •Echo effect Volume : — •Auto Vocal support Switch : OFF •Microphone Volume Attenuation : -10dB (2) AUTO MUTE FUNCTION The IC carries out auto mute function at the time of powering up in order to suppress shock noise that the digital delay may produce. •At power up Reset Time Mute time (400msec) MITSUBISHI ELECTRIC ( 9 / 14 ) MITSUBISHI SOUND PROCESSOR ICs S E R I E S 50 M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (3) 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 1 (MCLKCONT). Fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit. The oscillator frequency fck is following. fck = 4 MHz(Rc=22K ) Rc Note: The delay time (Td) for echo is determined by the clock frequency (fck). DC Current Clock oscillator circuit 1 Clock frequency:fck fck = 4 MHz(Rc = 22K ) Delay time = 196.6msec Delay time = 1/fckX48XN (N = the number of memory bits = 16384 (4) Microphone amplifier The gain(Gv) and low cut-off frequency(fcl) of microphone amplifier are expressed as follows. REF 1 R1+1.5K+334K fcl= Gv=20log• 2π•(R1+1.5K)•C1 R1+1.5K 2 MIC Gv(max)=47dB,fcl=225Hz R1=0 ,C1=0.47µF 10k (typ) 0.22µF 10k Assuming Gv=37dB, fcl=220Hz,for instance, the constants take the following values. 334k 1.5k 5 4 R1=3.3K ,C1=0.15µF R1 C1 MITSUBISHI ELECTRIC ( 10 / 14 ) MITSUBISHI SOUND PROCESSOR ICs S E R I E S 50 M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (5)ALC level diagram Vo(dBV) ALC OPERATING VOLTAGE SETTING RANGE 10 +2 0 -10 -20 MICROPHONE AMPLIFIER GAIN SETTIG=47dB -30 -70 -60 -50 -40 -30 -20 -10 Vi(dBV) (6) Input and output LPF for the digital echo The input and output LPF for the digital echo are configured as shown. figure below. C2:1000pF C1:4700pF 13 15 14 24k 24k 24k Input Output The accuracy of the internal resistance of the IC is approximately ±30% Cut-off frequency(fc) is given as follows. fc= 2π X 24k 1 X C1 X C2 = 2π X 24k 1 X 4700pF X 1000pF 3.1KHz Quality factor (Q) is given by the following equation for long echo. Q= 1 3 C1 C2 0.72 (Figure of 0.7 is recommended) MITSUBISHI ELECTRIC ( 11 / 14 ) MITSUBISHI SOUND PROCESSOR ICs S E R I E S 50 M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (7) Auto vocal support If you can not continue sing a song, the reference vocal from the source will support you automatically. Signal Detection Source selector mode On Lch monaural vocal cut Off (L+R)/2 (L+R)/2 Stereo Rch monaural (L+R)/2 same as above The timing of microphone input signal detection Reference level (REF+20mV) Microphone input level output release time 1.5s microphone signal detection On attack time 0s OFF MITSUBISHI ELECTRIC On ( 12 / 14 ) MITSUBISHI SOUND PROCESSOR ICs S E R I E S 50 M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT (8) Vocal cut support The sound components of the same phase and same sound volume in the L and R channels are attenuated. This made also allows components with lower frequency than the vocal band to pass through the filter, to compensate insufficient low-frequency sound. Lch INPUT vocal cut block OUTPUT Rch INPUT 30 C 0.15µ 1 fvc= =53.0Hz 2πCR LPF is formed by the internal R (20k ) and the external C, where C=0.15µF , cut off frequency is 53Hz. (9)Following is the phase shifter block, which makes phase surround effect. Phase Shifter Surround Lch INPUT Lch OUTPUT 33 C(external)=0.022µF 34 Rch INPUT Rch OUTPUT Source selector Surround L R Simulated Stereo (L+R)/2 Vocal cut Stereo Stereo Surround MITSUBISHI ELECTRIC ( 13 / 14 ) n. atio ange. Y c i f i A R pec o ch MITSUBISHI SOUND PROCESSOR ICs L is n ar P RicEe ; Theistric limits Not param e som 50 S E RI E S t ls fina bject IMIN ot a e su M65854FP KARAOKE DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT AUDSW1 AUDSW2 AUDSW3 AUDSW4 AUDSW5 ECHOVOL MIC1VOL MIC2VOL APPLICATION EXAMPLE 0.022µ 42 41 40 A/D A/D A/D 39 38 36 37 35 AUDIO SW I/F LIN RIN LOUT ROUT 34 1µ 33 32 0.15µ 1µ 1µ 31 30 28 29 (L+R) / 2 PHASE SHIFTER L 1µ R 0.0047µ 0.001µ 27 26 25 0.068µ 24 23 LPF STEREO 0.1µ 22 D/A 16kSRAM ECHO VOL ECHO F.B(-2dB) MAIN LOGIC MIC VOL MIC VOL MCLK A/D LPF 1 2 3 1/2Vcc ALC ALC 4 5 6 7 8 9 10 11 12 13 14 15 16 17 22 k 18 19 GND Vcc 21 20 100µ 4.7µ 0.22µ 10 k MIC1IN 0.022µ 4.7µ 1.0µ 0.1µ 0.22µ 0.001µ 0.1µ 1.0µ 100µ 0.068µ 0.1µ 0.0047µ 10 k MIC2IN Unit R: C:F MITSUBISHI ELECTRIC ( 14 / 14 ) 0.1µ