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Waveform Generator & A/D
Converter.
Figure 10-1 illustrates the Convergence Waveform
Generator and the A/D Converter. IC800 is the
Waveform Generator. It operates from a 3.3 volt
DC supply. No input buffers are needed for the hori-
zontal and vertical pulses from the Deflection cir-
cuitry. Also the external PLL circuitry used in previ-
ous models is no longer required.
The same control signals from the Control circuitry
are used:
• C-SDA ... I
• C-SCL .... I
• C-ACK ... Command Acknowledgment line
• C-BUSY ... Busy Line
• C-MUTE ... Momentarily disables the
Convergence Circuitry during Channel
Change, Input Change and during On/Off.
The HV-ADJ PWM signal and the DF parabolic sig-
nal are still generated in the Waveform Generator.
Six A/D Converter ICs were used in previous models.
In the V19/V21 there is only one A/D Converter IC,
10-2
2
C Data Line
2
C Clock Line
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