m65845 ETC-unknow, m65845 Datasheet

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m65845

Manufacturer Part Number
m65845
Description
Digital Echo With Microphone Mixing Circuit
Manufacturer
ETC-unknow
Datasheet

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m65845AFP
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m65845FP
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m65845FP
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MIC2
MIC1
SYSTEM CONFIGURATION
Lch
INPUT
Rch
INPUT
•High performance digital echo circuit thanks to 16Kbit
•Two microphone-mixing lines,vocal cut circuit,digital echo, and
•ALC-equipped microphone amplifiers permit excessively
•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)
Supply voltage range••••••••••Vcc=4.5~5.5V
Rated supply voltage•••••••••• Vcc=5V
memory
line-mixing amplifier are contained,enabling single-
chip package of microphone peripheral circuit of "Karaoke"
equipment.
high-input. ALC operating voltage can be set as desired.
RECOMMENDED OPERATING CONDITION
FEATURES
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.
ALC
ALC
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
MIC VOL
MIC VOL
MIC VOL
MIC VOL
MIX
MITSUBISHI
ELECTRIC
MITSUBISHI SOUND PROCESSOR ICs
SELECTOR
SOURCE
VOCAL
ECHO VOL
DIGITAL
ECHO
CUT
R
L
AUDIO SW
LOWPASS FILTER1 OUTPUT
LOWPASS FILTER1 INPUT
A/D INTEGRAL OUTPUT
M65845AFP
MIC1 VOLUME INPUT
MIC2 VOLUME INPUT
A/D INTEGRAL INPUT
PIN CONFIGURATION
ALC1 CONTROL
ALC2 CONTROL
MIC2 NF INPUT
MIC1 NF INPUT
A/D CONTROL
MIC1 OUTPUT
MIC2 OUTPUT
MIC OUTPUT
REFERENCE
MIC2 INPUT
MIC1 INPUT
MIX
GND
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
36P2R
(
MIX
MIX
1
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
/ 15 )
VOCAL CUT FILTER
ALC SUPPLY VOLTAGE
CONTROL
AUDIO SW2
AUDIO SW1
CLOCK CONT
MIC SW
MICECHO OUTPUT
Lch LINE OUTPUT
Rch LINE OUTPUT
Lch LINE INPUT
Rch LINE INPUT
ECHO VOLUME INPUT
LOWPASS FILTER2 OUTPUT
LOWPASS FILTER2 INPUT
D/A INTEGRAL OUTPUT
D/A INTEGRAL INPUT
D/A CONTROL
POWER SUPPLY
Lch
OUTPUT
Rch
OUTPUT
MIC SW

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m65845 Summary of contents

Page 1

... 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 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 ...

Page 2

... DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT IC INTERNAL BLOCK DIAGRAM MITSUBISHI SOUND PROCESSOR ICs M65845AFP MITSUBISHI ELECTRIC ( ...

Page 3

... 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 A/D INTEGRAL OUTPUT ADM A/D adaptive control A/D CONTROL REFERENCE 1/2Vcc, connect filter C GND D/A CONTROL ADM A/D adaptive control MITSUBISHI ELECTRIC M65845AFP Function ( ...

Page 4

... Mixing output with line and microphone Mixing output with microphone and echo MIC SW L; Microphone OFF H; Microphone ON Controls built-in clock generation circuit with external R Changing source sound signal Forms ALC operation voltage with control voltage Through frequency under vocal level MITSUBISHI ELECTRIC M65845AFP Function ( ...

Page 5

... Input voltage Power dissipation Pd Operating temperature Topr Tstg Storage temperature RECOMMENDED OPERATING CONDITION Symbol Parameter Vcc Supply voltage L input voltage input voltage V iH MITSUBISHI SOUND PROCESSOR ICs M65845AFP Conditions Conditions Min 4.5 0 33,34PIN 4 MITSUBISHI ELECTRIC Unit Rations V 6 -0.3~Vcc+0.3 860 ...

Page 6

... Noise voltage No Input impedance Noise voltage Gv Voltage gain V MAX Maximum output voltage o G Vocal rejection ratio REJ MITSUBISHI SOUND PROCESSOR ICs M65845AFP Conditions Min 25 No signal 44 Vo=-17dBV Vo=-17dBV,without ALC Vi=-27dBV,ALC operate at -10 ~ +3dBV - C=4.7µF 1.0 at C=4.7µF -1 THD=10% Gv=47dB,JIS-A,VI=0Vrms ...

Page 7

... Gv(max)=47dB,fcl=50Hz R1=0 ,C1=2.2µF Assuming Gv=37dB, fcl=15Hz,for instance, the constants take the following values. R1=3.3K ,C1=2.2µF << Attention point when M65845FP is replaced with M65845AFP >> 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. ...

Page 8

... When ALC operation voltage is -5dBV -5dBV=0.56V rms V =2.5-0.8=1.7V ALC are concerned. MITSUBISHI SOUND PROCESSOR ICs -40 -30 v i(dBV) 35 pin control voltage V po (at Vcc=5V) =1.59V =0.80V p-p p-o MITSUBISHI ELECTRIC M65845AFP ALC supply voltage control limits -20 -10 1 2.5V( Vcc) 2 internal direct bias ALC ALC ...

Page 9

... Input low level to 31 pin (MIC SW) ,then microphone and echo signal can be cut. 31 pin (MIC SW OPEN L MITSUBISHI SOUND PROCESSOR ICs Vcc R17(51k) R16 C33(0.01µ pin control voltage VALC (V) 0.50 1.09 1.38 1.61 1.79 1.94 2.05 ECHO SIGNAL MIC SW ON OFF MITSUBISHI ELECTRIC M65845AFP resistance R16 ( ) 5.6k 15k 20k 24k 27k 33k 36k OUTPUT ON MUTE ( ...

Page 10

... 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 SOUND PROCESSOR ICs 34 AUDSW2;D2 Stereo L H Lch monaural L Rch monaural H vocal cut MITSUBISHI ELECTRIC M65845AFP Movements ( ...

Page 11

... It is also having a function which through frequency under vocal level for supplying a lack of low level sound. fc= at fc=50Hz, C34=0.15µF is determined. Caution; Inside resistance is changeable one by one which rate is ±30%. MITSUBISHI SOUND PROCESSOR ICs Rvc=20k typ 36 C34 1 2 RvcC34 MITSUBISHI ELECTRIC M65845AFP ( ...

Page 12

... MIC SW in order to suppress shock noise that the digital delay may produce. •At power up Reset Time •At switching on MIC SW MIC SW OFF switching on MIC SW MITSUBISHI SOUND PROCESSOR ICs M65845AFP fck = 2 MHz(Rc=51K ) 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=51K ) : Delay time=197msec fck = 2 ...

Page 13

... So, cut off frequency is determined by next formula. fsig= LPF1 REF 12 R8 C14 24k R7 24k R9 C13 MITSUBISHI SOUND PROCESSOR ICs • R9 • C13 • C14 13 R7 24k 24k MITSUBISHI ELECTRIC M65845AFP LPF2 REF C14 24k R9 24k C13 ( ...

Page 14

... 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. ...

Page 15

... MICOUT 11 24k 0.047µ 24k LPF1IN 12 1000p 24k LPF1OUT 13 ADINTIN 14 0.068µ ADINTOUT 15 ADCONT 16 0.1µ REF 17 47µ GND 18 MITSUBISHI SOUND PROCESSOR ICs M65845AFP 0.15µ VCFIL 36 VALC 35 AUDSW2 34 D2 AUDSW1 33 D1 CLOCK 32 CONT MICSW 31 MIC SW MICECHO 30 OUT 2.2µ LLINEOUT 29 2.2µ ...

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