MITSUMI
NTSC PAL Converter MM1130
NTSC PAL Converter
Monolithic IC MM1130
Outline
This is an NTSC/PAL signal switching IC.
In PAL conversion mode, a frequency-converted (fc=4.43MHz) NTSC format chroma signal is phase
converted (R-Y axis component is inverted) every 1 hour by shifting burst signal phase by 45.
Circuit configuration includes VCO (horizontal sync), VCXO (phase conversion carrier), phase conversion
circuit, switches, amps, etc.
Features
1. PAL conversion with phase conversion performed
2. Two possible phase conversion carriers : crystal oscillation and external input
3. No adjustments
4. Four possible mode selections by CTL and EXT pins
Package
SDIP-22A (MM1130XD)
Applications
1. VCR
Block Diagram
MITSUMI
NTSC PAL Converter MM1130
Pin Description
Pin no.
Pin name
Function
Internal equivalent circuit diagram
1
chroma IN
Inputs chroma signal
2
CTL
Mode setting pin
3
C.SYNC IN
Inputs composite sync
signal
4
LP2
Time constant connection
pin for H. SYNC APC loop
LPF
5
R
H. SYNC APC feedback pin
6
C2
Pin for connecting H.
SYNC APC free run
frequency setting capacitor
7
BGP ADJ
Fine tuning of position for
sampling burst signal. Use
open.
MITSUMI
NTSC PAL Converter MM1130
Pin no.
Pin name
Function
Internal equivalent circuit diagram
8
OUT
Amp output pin
9
EXT
Mode setting pin
10
AMP IN
Amp input pin
11
GND1
GND pin
12
CONV.
OUT
Multiplication circuit output
pin
13
V
CC
V
CC
pin.
Inputs 5V.
14
XT1
Carrier (2fsc) oscillation
circuit output pin
15
XT2
Carrier (2fsc) input pin
MITSUMI
NTSC PAL Converter MM1130
Pin no.
Pin name
Function
Internal equivalent circuit diagram
16
C1
Carrier APC phase shift pin
17
LP1
Time constant connection
pin for carrier APC loop
LPF
18
PS IN2
Carrier APC input pin. Pin
18 input signal burst signal
and carrier signal are
phase locked.a
19
PS IN1
Burst signal phase input
pin during PAL
conversion.
20
S2
Phase shift circuit output
pin. Signal is Pin 21 output
inverted.
21
S1
Phase shift circuit output
pin. Signal is Pin 20 output
inverted.
22
GND2
GND pin
MITSUMI
NTSC PAL Converter MM1130
Absolute Maximum Ratings
(Ta=25C)
Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
=5.0V, SW13 : b)
Item
Symbol
Ratings
Units
Storage temperature
T
STG
-40~+125
C
Operating temperature
T
OPR
-20~+75
C
Power supply voltage
V
CC
max.
7
V
Allowable loss
Pd
600
mW
Item
Symbol
Measurement
Measurement conditions
Min. Typ. Max. Units
circuit
Operating power supply voltage
V
CC
4.7
5.0
5.3
V
Consumption current
I
CC
13
SW2, 9, 13 : a, no input
29.0 40.0 mA
Dynamic range
D
0.8
V
P-P
Slew mode (SW2 : b, SW9 : a, V
IN
1=SG1, V
IN
3=SG2)
Gain
Gt
8
*
1
-1.0
0
1.0
dB
Phase difference
t
8
*
2
-5
0
5
deg
PAL conversion mode Hn (SW2 : a, SW9 : a, V
IN
1=SG1, V
IN
3=SG2)
*
3
Burst gain
G1bt
8
*
1
-1.0
0
1.0
dB
Red gain
G1r
8
*
1
-1.0
0
1.0
dB
Green gain
G1g
8
*
1
-1.0
0
1.0
dB
Blue gain
G1b
8
*
1
-1.0
0
1.0
dB
Burst phase
1bt
8
130.0 135.0 140.0 deg
Red phase
1r
8
98.5 103.5 108.5 deg
Green phase
1g
8
235.6 240.6 245.6 deg
Blue phase
1b
8
342.6 347.6 352.6 deg
PAL conversion mode Hn+1 (SW2 : a, SW9 : a, V
IN
1=SG1, V
IN
3=SG2)
*
3
Burst gain
G2bt
8
*
1
-1.0
0
1.0
dB
Red gain
G2r
8
*
1
-1.0
0
1.0
dB
Green gain
G2g
8
*
1
-1.0
0
1.0
dB
Blue gain
G2b
8
*
1
-1.0
0
1.0
dB
Burst phase
2bt
8
-145.0 -135.0 -125.0 deg
Red phase
2r
8
-113.5 -103.5 -93.5 deg
Green phase
2g
8
-250.6 -240.6 -230.6 deg
Blue phase
2b
8
-357.6 -347.6 -337.6 deg
(SW2 : a, SW9 : a, V
IN
1=SG1, V
IN
3=SG2)
DC step
V
8
*
4
40
mV
BGP timing
t1
8
*
5
3.5
4.3
5.1
S
BGP width
t2
8
*
5
3.7
4.5
5.3
S
Hn/Hn+1 switching timing
t3
8
*
5
-0.6
0.2
1.0
S
VCO (SW2 : a, SW9 : a, V
IN
1 : N0)
Free-running frequency
fo1
6
V
IN
3 : GND
14.2 15.7 17.2 kHz
Acquisition range
fc1
6
V
IN
3 : SG3
*
6
1.5
kHz
VCXO (SW2 : b, SW9 : b)
Free-running frequency
fo2
14
V
IN
1 : No, V
IN
3 : 5.0V
8.86 8.86 8.86
6438 7238 8038
MHz
Acquisition range
fc2
14
V
IN
1 : SG4, V
IN
3 : SG2
*
7
400
Hz
(SW2 : b, SW9 : b, V
IN
1=SG5, V
IN
3=SG3)
Carrier leak
V
C
1
12
*
8
-20
dB
Control pin input resistance (V
IN
1=SG1, V
IN
3=SG2)
CTL pin switching voltage
Vt1
3
Lower pin 3 from 5V.
0.7
1.4
2.1
V
Voltage when pin 8 switches.
EXT pin switching voltage
Vt2
9
Lower pin 9 from 5V.
0.7
1.4
2.1
V
Voltage when pin 8 switches.
MITSUMI
NTSC PAL Converter MM1130
Input Signals
SG1
Color bar chroma signal f=4.433619MHz V=630mV
P-P
SG2
C. SYNC signal 0V-5V
SG3
15.74kHz pulse wave f : frequency variation 0V-5V
SG4
Color bar chroma signal f : frequency variation V=630mV
P-P
SG5
Continuous sine wave f : 4.433619MHz V=630mV
P-P
variable
0V
5V
4.7
S
Carrier frequency variable
630mVp-p
SG3
SG4
Notes:
*
1 Gain is calculated by 20log (Pin 8 level/Pin 1 level).
*
2 Phase difference is difference between input and output phases (given B-Y axis as 0.)
*
3 Hn output is 1 horizontal output after input signal burst is shifted +45. Hn
+1
output is 1 horizontal output
after input signal burst is shifted +45, and that signal is R-Y converted.
*
4 DC step difference is the total of burst sampling step different during PAL conversion and 1H switching
step difference.
*
5 BGP, Hn/Hn + 1 Switching Timing
*
6 This is the smaller of frequency f and horizontal sync signal frequency (fH=15.73khz) difference when the
frequencies are separated sufficiently high and low, then brought closer, and the waveform locks.
*
7 This is the smaller of frequency f and carrier frequency (fC=4.433619MHz) difference when the frequencies
are separated sufficiently high and low, then brought closer, and the waveform locks.
*
8 Carrier leak is the 8.86MHz component level at Pin 12.
Vc1=20log (8.86MHz component/4.43MHz component) dB
1H
1H
burst sampling step difference
burst sampling
1H switching step difference
C.SYNC
BGP
Hn/Hn
+
1
switching timing
t1
t2
t3
4.7
S
MITSUMI
NTSC PAL Converter MM1130
Mode Settings
CTL
EXT
L
L
PAL conversion mode
H
L
Through mode
H
H
R-Y conversion mode
L
H
Hn + 1 (PAL) output mode
Burst
Chroma
R-Y
B-Y
Burst
Chroma
R-Y
B-Y
Burst
Chroma
R-Y
(Hn)
(Hn
+
1)
B-Y
Burst
Chroma
R-Y
B-Y
Switching every 1H
Burst
Chroma
R-Y
B-Y
PAL conversion mode
Through mode
R-Y conversion output mode
Hn + 1 (PAL) output mode
Measuring Circuit
MITSUMI
NTSC PAL Converter MM1130
Application Circuits
1. For crystal oscillation of 2fsc
2. For external input of 2fsc
2fsc phase
Input burst phase
*
1 Regarding 2fsc input
Input 2fsc with input level of more than
500mV
P-P
and phase as shown in the figure
at left.
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