cxa1645p Sony Electronics, cxa1645p Datasheet - Page 11

• Manufacturer Part Number: cxa1645p
• Description: Rgb Encoder
• Manufacturer: Sony Electronics

Description of Operation
22 and 21, respectively.
difference signals R-Y and B-Y. The Y signal enters the delay line to adjust delay time with the color signal C.
Then, after addition of the CSYNC signal input from Pin 10, the Y signal is output from Pin 16.
is input to the modulators and modulated by the R-Y signal and the B-Y signal. Modulated subcarriers are
mixed, sent to the band pass filter to eliminate higher harmonic components and finally output from Pin 15 as
the C signal. At the same time, Y and C signals are mixed and output from Pin 20 as the composite video
signal.
Burst Signal
input.
Analog RGB signals input from Pins 2, 3 and 4 are clamped in the clamping circuit and output from Pins 23,
The matrix circuit performs operations on each input signal, generating luminance signal Y and color
A subcarrier input from Pin 6 is input to the phase shifter, where its phase is sfited 90°. Then, the subcarrier
The CXA1645P/M generates burst signals at the timing shown below according to the composite sync signal
H synchronization
V synchronization
C VIDEO
SYNC
(TTL level)
C VIDEO
OUT
IN
COUT
SYNC
OUT
EVEN
EVEN
IN
ODD
ODD
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t
t
D (B)
D (B)
Burst signal
Synchronizing signal
t
t
W (B)
W (B)
Burst signal
CXA1645P/M