MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
APPLICATION
This IC can be used Analog Signal processing of Power Amp.front stage
This IC can be used Car Audio System,Home Audio System and TV.
FEATURES
This IC is unnecessary for outside putting CR by using SCF for Loudness and Tone Control.
Bass : +16dB to -12dB/2dBstep. f0,Q=variable. f0=50Hz,80Hz,120Hz Q=1,1.25,1.5,2
Mid : +12dB to -12dB/2dBstep. f0,Q=variable. f0=700Hz,1KHz,2KHz,10KHz Q=1.5,2
Treble : +12dB to -12dB/2dBstep. f0=variable. f0=8KHz,12KHz
Loudness : f0=variable. f0=60Hz,80Hz,100Hz
Build-in Non Fader Volume
+12dB to -12dB /2dB step, - dB
Build-in Zero-Crossing Detector Circuit for Changing Noise Measure.
Build-in Differential Input and Differential Output
Build-in Input Selector (4 input + Differential Input)
Build-in Input Gain Control
Outline
0dB to +18.75dB/1.25dB step
Build-in Master Volume and Fader Volume (Front,Rear)
36P2R
Volume : 0dB to -83dB , - dB/1dB step
Fader : 0dB ,-1dB,-2dB,-3dB,-4dB,-6dB,-8dB,-12dB,-16dB,-20dB,-30dB,-45dB,-60dB,- dB/16 step
Serial Data Control of 2 lines formula.
RECOMMENDED OPERATING CONDITIONS
Supply voltage range...VCC=7V to 9V
VDD=4.5V to 5.5V
Rated supply voltage... VCC=8V
VDD=5V
SYSTEM BLOCK DIAGRAM
DEFN
OUT2
DEFP
IN2
DEFN
IN2
Differential
Amp.
Volume1 Loudness
-
+
Fader
Volume2
Bass/Mid/
Treble
Front
Rear
INA2
Non Fader
INB2
Input Gain Control
INC2
IND2
Zero-Cross Detector Circuit
u-com
Interface
Zero-Cross Detector Circuit
IND1
Input Gain Control
INC1
Non
Fader
Master Volume is composed of Volume1 and
Volume2
Volume1 Loudness
DEFN
IN1
Differential
Amp.
-
+
Bass/Mid/
Treble
Volume2
CLOCK
Non
Fader
Master Volume is composed of Volume1 and
Volume2
Non Fader
INB1
INA1
DATA
Fader
Rear
Front
DEFP
IN1
DEFN
OUT1
D-61508-98-C
MITSUBISHI
ELECTRIC
( 1 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
12dB
12dB
+
D-61508-98-C
+
MITSUBISHI
ELECTRIC
( 2 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
PIN DESCRIPTION
Pin No.
Function
Symbol
1
REF
Signal Ground of IC. Grounding about 10uF
2
DEFP IN1
Positive Input pin of Differential Amp.
3
DEFN IN1
Negative Input pin of Differential Amp.
4
INA1
5
INB1
6
INC1
7
IND1
8
DEFN OUT1
Output pin (-) of Differential Amp.
9
SEL OUT1
Output pin of Input Selector
10
VOL IN1
Input pin of Volume1
11
TONE OUT1
Output pin of Tone
12
FADER IN1
Input pin of Volume2
13
REAR OUT1
Output pin of Fader Volume (rear)
14
FRONT OUT1 Output pin of Fader Volume (front)
15
Non Fader OUT1 Output pin of Non Fader Volume
16
GND
Ground Pin
17
DATA
Input pin of Control Data.
It synchronized at CLOCK and inputted Data
18
N.C.
N.C. Pin
Input pin of Channel 1 for Input Selector SW
D-61508-98-C
MITSUBISHI
ELECTRIC
( 3 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
Pin No.
System
Function
19
N.C.
N.C. Pin
20
CLOCK
Clock Input pin for Serial Data Transmission
21
VDD
Digital Power Supply pin
22
Non Fader OUT2 Output pin of Non Fader Volume
23
FRONT OUT2 Output pin of Fader Volume (front)
24
REAR OUT2
Output pin of Fader Volume (rear)
25
FADER IN2
Input pin of Volume 2
26
TONE OUT2
Output pin of Tone
27
VOL IN2
Input pin of Volume1
28
SEL OUT2
Output pin of Input Selector
29
DEFN OUT1
Output pin (-) of Differential Amp.
30
IND2
31
INC2
32
INB2
33
INA2
34
DEFN IN1
Negative Input pin of Differential Amp.
35
DEFP IN1
Positive Input pin of Differential Amp.
36
VCC
Analog Power Supply pin
Input pin of channel 2 for Input Selector SW
D-61508-98-C
MITSUBISHI
ELECTRIC
( 4 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
D-61508-98-C
MITSUBISHI
ELECTRIC
( 5 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
ELECTRICAL CHARACTERISTICS
(Ta=25 C,VCC=8V,VDD=5V,Input Gain/Volume/Tone/fader=0dB,Loudness=OFF,unless otherwise noted.)
Limits
Symbol
Parameter
Test conditions
Unit
Min
Icc
Circuit Current
Pass Gain
Volume Maximum
ATT(VOL) Attenuation Quantity
Crosstalk between
ATT(VOL) Channels
No signal setting
GV
VIM
Maximum Input Voltage
typ
-2
Vi=1Vrms , f=1KHz
ATT(VOL)= - dB
ATT(VOL)= 0dB
-2
Max
40
mA
0
+2
dB
-90
-80
dB
0
+2
dB
1.8
Vrms
f=1KHz , DIN-AUDIO
THD=1%
G(Bass)B
Boost Quantity (Bass)
f=100Hz
13
16
19
dB
G(Bass)C
Cut Quantity (Bass)
f=100Hz
-15
-12
-9
dB
G(MID)B
Boost Quantity (Mid)
f=1KHz
9
12
15
dB
G(MID)C
Cut Quantity (Mid)
f=1KHz
-15
-12
-9
dB
G(Tre)B
Boost Quantity (Treble)
f=10KHz
9
12
15
dB
G(Tre)C
Cut Quantity (Treble)
Fader Maximum
Attenuation Quantity
f=10KHz
-15
-12
-9
dB
-90
-80
dB
Maximum input voltage
f=1KHz , DIN-AUDIO
A TT (FED)
VOM
Vi=1Vrms , f=1KHz,DIN-AUDIO
ATT(FED)= -
dB
Vrms
1.8
THD=1%
Vno 1
Rg=0,DIN-AUDIO
12
Vno 2
Bypass setting
Rg=0,DIN-AUDIO
5
output noise voltage
ATT(VOL)= - dB
Rg=0,DIN-AUDIO
Vno 3
THD
Total harmonic distortion
uVrms
3.5
f=1KHz,Vo=0.5Vrms
BW:400Hz to 30KHz
0.01 0.05
%
CS
Channel Separation
f=1KHz,DIN-AUDIO
-90
-75
dB
CT
Input Selector Crosstalk
f=1KHz,DIN-AUDIO
-75
-60
dB
13
16
dB
Loudness ON , f=100Hz
Gv(LOUD) Loudness voltage gain
VOL1= -30dB , VOL2=0dB
10
LOUD_VOL= -20dB
Gv(GAIN) Input gain control
Common Mode
CMRR
Rejection Ratio
D-61508-98-C
Gv(GAIN)= +18.75dB
2,3pin/34,35pin
Common mode signal input setting
MITSUBISHI
ELECTRIC
15.75 18.75 21.75
dB
50
dB
( 6/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
CONNECTION of DATA AND CLOCK
CLOCK
D0
D1
D2
D32
D3
D33
D34
DATA
Latch signal "H"
Data signals are read at rising edges of Clock.
Latch signals are read at rising edges of Clock.
DIGITAL BLOCK DIRECT CURRENT CHARACTERISTIC
Symbol
Parameter
V IL
V IH
"L" Level Input Voltage
"H" Level Input Voltage
I
"L"Level
Input Electric Current
"H"I Level Input Electric Current
I
I
IL
IH
D-61508-98-C
Test Conditions
VDD=5V setting
DATA,CLOCK Pin
V=0V
V=5V
MITSUBISHI
ELECTRIC
DATA,
CLOCK Pin
Min
Limits
typ Max
0
1.0
4.0
5.0
-10
10
10
Unit
V
uA
( 7 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
CLOCK AND DATA TIMING
t
cr
75%
CLOCK
25%
t
r
t
WHC
t
f
t
WLC
DATA
t SD
t
HD
DIGITAL BLOCK ALTERNATING CURRENT CHARACTERISTIC
Symbol
t
t
t
t
t
t
t
cr
Parameter
WLC
r
CLOCK Rise Time
f
CLOCK Hall Time
DATA Setup Time
DATA Hold Time
SD
HD
D-61508-98-C
Limits
typ
Max
Unit
4
CLOCK Cycle Time
CLOCK Pulse Width ("H" level)
CLOCK Pulse Width ("L" level)
WHC
Min
1.6
1.6
0.4
0.4
uS
0.8
0.8
MITSUBISHI
ELECTRIC
( 8 /22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
D-61508-98-C
MITSUBISHI
ELECTRIC
( 9/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
VOLUME 1 CODE
CH1
CH2
ATTVA1
0dB
-1dB
-2dB
-3dB
-4dB
-5dB
-6dB
-7dB
-8dB
-9dB
-10dB
-11dB
-12dB
-16dB
-20dB
-24dB
-28dB
D0
D7
D1
D8
D2
D9
D3
D10
D4
D11
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D0
D6
D1
D7
D2
D8
D3
D9
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
ATTVA2
CH1
D5
D6
CH2
D12
D13
1
0
1
0
1
1
0
0
0dB
-1dB
-2dB
-3dB
ATTVA2 fixed to 0dB when
0dB
-12dB setting.
VOLUME 2 CODE
ATT
VB1
CH1
CH2
0dB
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
-14dB
-16dB
-24dB
-32dB
-40dB
-48dB
-56dB
- dB
ATTVB2
CH1
CH2
0dB
-2dB
-4dB
-6dB
D4
D5
D10
D11
1
0
1
0
1
1
0
0
ATTVB2 fixed to 0dB when
0dB
-16dB setting.
TIMER SETTING CODE
TIMER
D25
D26
5mS
1
1
10mS
0
1
15mS
1
0
20mS
0
0
D-61508-98-C
MITSUBISHI
ELECTRIC
(10/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
TONE CODE
MID
TREBLE
LOUDNESS VOLUME CODE
D8
12dB
10dB
8dB
6dB
4dB
2dB
0dB
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
D15
0
1
0
1
0
1
0
1
0
1
0
1
0
D9
D16
1
0
0
1
1
0
0
0
1
1
0
0
1
D10
D17
1
1
1
0
0
0
0
0
0
0
1
1
1
D11
D18
0
0
0
0
0
0
0/1
1
1
1
1
1
1
BASS
D0
D1
D2
D3
16dB
0
0
0
1
14dB
1
1
1
0
12dB
10dB
8dB
6dB
4dB
2dB
0dB
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
0
1
1
0
0
1
1
1
1
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
LOUDNESS
D21
D22
D23
D24
-2dB
-4dB
-6dB
-8dB
-26dB
-28dB
-30dB
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
dB
0
0
0
0
-10dB
-12dB
-14dB
-16dB
-18dB
-20dB
-22dB
-24dB
-
refer to 21,22 page for Loudness gain
* Please
setting.
LOUDNESS fO CONTROL
LOUDNESS fO CONTROL
D30
D31
1
0
1
1
1
0
f0=60Hz
f0=80Hz
f0=100Hz
TONE f0,Q CONTROL CODE
BASS f0 CONTROL
f0=50Hz
f0=80Hz
f0=120Hz
BASS Q CONTROL
Q=2
Q=1.5
Q=1.25
Q=1
D-61508-98-C
D4
D5
1
0
1
1
1
0
D6
D7
1
0
1
0
1
1
0
0
MID f0 CONTROL
f0=700Hz
f0=1KHz
f0=2KHz
f0=10KHz
D13
1
0
1
1
0
0
1
0
MID Q CONTROL
Q=1.5
Q=2
D12
TREBLE f0 CONTROL
f0=8KHz
f0=12KHz
D19
1
0
D14
1
0
MITSUBISHI
ELECTRIC
(11/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
SELECTOR CODE
NON FADER CODE
SELECTOR
D14
D15
D16
ATT
D26
D27
D28
D29
INA
INB
INC
IND
0
1
0
1
0
0
1
1
0
0
1
0
0
0
0
+12dB
+10dB
+8dB
+6dB
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
D21
D22
D23
D24
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Differential Input
+4dB
+2dB
0dB
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
- dB
INPUT GAIN CONTROL CODE
INPUT GAIN
CONTROL
D17
D18
D19
D20
0dB
1.25dB
2.50dB
3.75dB
5.00dB
6.25dB
7.50dB
8.75dB
10.00dB
11.25dB
12.50dB
13.75dB
15.00dB
16.25dB
17.50dB
18.75dB
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D-61508-98-C
1
1
1
1
0
0
0
0
0
0
0
0
FADER CODE
FADER
0dB
-1dB
-2dB
-3dB
-4dB
-6dB
-8dB
-10dB
-12dB
-14dB
-16dB
-20dB
-30dB
-45dB
-60dB
- dB
MITSUBISHI
ELECTRIC
(12/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
LOUDNESS,TONE CONTROL FREQUENCY CHARACTERISTIC
fig.1) Loudness Frequency Characteristic
fig.2) Loudness Frequency Characteristic(VOL=-30dB,Loudness=-20dB,fO=Variable)
fig.3) Bass Frequency Characteristic(fO=50Hz,Q=2,Gv=Variable)
fig.4) Bass Frequency Characteristic(Gv=+16dB,fO=Variable,Q=2)
D-61508-98-C
MITSUBISHI
ELECTRIC
(13/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
fig.5) Bass Frequency Characteristic (Gv=+16dB,Q=Variable, fO=50Hz)
fig.6) Mid Frequency Characteristic (fO=1kHz,Q=2,Gv=Variable)
fig.7) Mid Frequency Characteristic (Gv=+12dB,Q=2,fO=Variable)
fig.8) Mid Frequency Characteristic (Gv=+12dB,fO=1kHz,Q=Variable)
D-61508-98-C
MITSUBISHI
ELECTRIC
(14/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
fig.9) Treble Frequency Characteristic (Gv=Variable)
fig.10) Treble Frequency Characteristic (Gv=+12dB,fO=Variable)
D-61508-98-C
MITSUBISHI
ELECTRIC
(15/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
ZERO-CROSSING DETECTION CIRCUIT
1. Meaning of Zero-Crossing Detection Circuit
In the conventional Serial Data Control Type Volume, Analog SW inside switches over
simultaneously with Latch Condition Detector. And the operation completes.
CLK
D32
D33
Latch Conditions
D34
DATA
Noise Factor when
Signal is present
Audio Signal
Signal GND(1/2Vcc)
In this case the changing noise occurs at the time of Latch Condition Detector, the
Analog SW switches over (Zero-cross Detector Strobe occurs) in the moment that the
Analog Signal cross Signal Ground (1/2VCC).
CLK
D32
D33
Latch Conditions
D34
DATA
Zero-cross Detector Strobe
(Form signal from inside IC)
Analog SW changing
Signal GND (1/2Vcc)
Other,In the case of Audio Signal isn't inputted (No signal),even if only Zero-cross
Detector Circuit detects Latch Condition, Analog SW doesn't switch over for the
Audio Signal never cuts Signal Ground (1/2VCC).
The Time Function switches the Analog SW after some time T.
The Timer Time can setting with the Serial Data of 5mS,10mS,15mS,20mS.
D-61508-98-C
MITSUBISHI
ELECTRIC
(16/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
2. Connection of Zero-Crossing Detector and Timer Setting
"OR" of [Zero-cross Detector Strobe] or [Compulsion SW of Timer Circuit] moves
Internal Analog SW . When for example, suppose that it set to T=10msec.
T=10 msec
CLK
D32
D33
D34
Latch Conditions
DATA
Pattern 1
Zero-cross Detector Strobe
(Form signal from inside IC)
Audio Signal
SW Changing
Pattern 2
Zero-cross Detector Strobe
(Form signal from inside IC)
Audio Signal
SW Changing
In case of Pattern1, the Zero-cross Detector Strobe occurs with the Zero-cross Detector
Function, and SW is switched. But in case of Pattern2, the Timer Function switches the
Analog SW after T=10msec, for the Audio Input Signal didn't cut the Signal Ground after
T=10msec which were set with the timer.
Timer Setting Time setting for Frequency band of Input Audio Signal.
D-61508-98-C
MITSUBISHI
ELECTRIC
(17/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
3. Timer Setting System
T=10 msec
CLK
Latch
Conditions
D34
DATA
f=
1
2
T
=
1
=50Hz
2 10msec
Audio Signal
In case of Timer Setting Time/T =10 msec setting
Audio Signal
Zero-cross Detector
50Hz <
100%
Upper fig.
100%
Pattern 1
0%
Pattern 2
50Hz >
T=10 msec
CLK
D34
DATA
Latch
Conditions
Pattern 1
Audio Signal
f=30Hz
Pattern 2
Audio Signal
f=30Hz
The Timer Setting Time T makes T=20msec (Zero-cross detect of 25Hz is 100%)
maximum and it is setting by it.
D-61508-98-C
MITSUBISHI
ELECTRIC
(18/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
4. Connection of Data Transmission and Timer Setting
M61508FP has the function to make the Serial Data invalid until it generations the
Zero-cross Detector Strobe in IC, after the Latch Condition detected.
Timer Setting T
Latch Conditions
Latch
Conditions
CLK
D0
DATA
to
D33 D34
D0
"A"
Zero-cross Detector Strobe
(Form signal from inside IC)
to
D33 D34
"B"
Serial Data Transmission Interval IT
Audio Signal
SW Changing for DATA "A"
* In case of upper figurative.The order of DATA "B" is invalid.
In to make the Serial Data Transmission Interval IT from MCU(microcomputer) to
M61508FP
Serial Data Transmission Interval=IT > Timer Setting= T
the reading error of the data doesn't occur.
Data Transmission Interval IT =Interval of between Latch Condition
* Serial
and Latch Condition
D-61508-98-C
MITSUBISHI
ELECTRIC
(19/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
D-61508-98-C
MITSUBISHI
ELECTRIC
(20/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
2 LOUDNESS GAIN SETTING
Lower Figure is Structure of Loudness Circuit.
VIN
10
V1
R
VOUT
VOLUME 1
LOUDNESS
FILTER
(Gv=0dB)
V2
R
R
R
LOUDNESS VOLUME
Output Volutage (VOUT) of Setting Structure of Upper Figure
It is noted as Volume1Output Volutage = V1, Loudness Filter Output Voltage = V2,
VOUT and Gv (Boost quantity) is given at the lower formula
VOUT = V1 + V2 (Vrms)
Gv = 20 log
(V1 + V2)
VIN
- (Volume 1 attenuation quantity) (dB)
ex.) VIN = 1Vrms/60Hz,Volume1= - 30dB,
Output Volutage and Boost Quantity of 60Hz of Loudness Volume = -20dB setting
From : Volume1,Loudness Volume attenuation quantity
Become : V1 = 31.6mVrms
V2 = 100mVrms
If the subsitudes the equation for the upper formula,
the following equation is given :
Gv
Volume 1= -30dB
VOUT = 31.6m + 100m
Frequency (Hz)
=131.6mVrms
Gv = 20 log
(31.6m + 100m)
- (-30dB)
1
= 12.4dB is obtained.
In the item,the Loudness Gain Setting example is shown, when Volume1 fixation and
doing the Loudness Volume variably. Please refer to Plan.
D-61508-98-C
MITSUBISHI
ELECTRIC
(21/22)
MITSUBISHI SOUND PROCESSOR ICs
M61508FP
THE ELECTRIC VOLUME of BUILD-IN NON FADER VOLUME with TONE CONTROL
LOUDNESS GAIN SETTING EXAMPLE
1 Volume1= -10dB
LOUDNESS
VOLUME
LOUDNESS GAIN
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
-14dB
-16dB
-18dB
-20dB
-22dB
-24dB
-26dB
-28dB
-30dB
- dB
10.9dB
9.5dB
8.2dB
7.1dB
6.0dB
5.1dB
4.2dB
3.5dB
2.9dB
2.4dB
1.9dB
1.6dB
1.3dB
1.0dB
0.8dB
0dB
2 Volume1= -20dB
LOUDNESS
VOLUME
LOUDNESS GAIN
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
-14dB
-16dB
-18dB
-20dB
-22dB
-24dB
-26dB
-28dB
-30dB
- dB
19.0dB
17.3dB
15.6dB
13.9dB
12.4dB
10.9dB
9.5dB
8.2dB
7.1dB
6.0dB
5.1dB
4.2dB
3.5dB
2.9dB
2.4dB
0dB
3 Volume 1=-30dB
LOUDNESS
VOLUME
LOUDNESS GAIN
-2dB
-4dB
-6dB
-8dB
-10dB
-12dB
-14dB
-16dB
-18dB
-20dB
-22dB
-24dB
-26dB
-28dB
-30dB
- dB
D-61508-98-C
28.3dB
26.4dB
24.5dB
22.7dB
20.8dB
19.0dB
17.3dB
15.6dB
13.9dB
12.4dB
10.9dB
9.5dB
8.2dB
7.1dB
6.0dB
0dB
MITSUBISHI
ELECTRIC
(22/22)