Drive level control system for testing kinescopes

Details Drive level control system for testing kinescopes Drive level control system for testing kinescopes

1982-02-05

1984-03-13

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358172, H04N 702

Patent

active

044371209

ABSTRACT:
A drive level control circuit for testing a kinescope detects the vertical blanking pulses and provides a DC voltage, the level of which is proportional to the level of the blanking pulses. The vertical sync pulses are used to gate the circuit during vertical blanking. The DC voltage is compared to a reference voltage and the result of the comparison is used to control the drive level to an element of the electron gun in the kinescope.

REFERENCES:
patent: 2947936 (1960-08-01), Stone
patent: 3207998 (1965-09-01), Corney et al.
patent: 3461234 (1969-08-01), Slusarski et al.
patent: 3487165 (1969-12-01), Anderson et al.
patent: 3543169 (1970-11-01), Hill
patent: 3985954 (1976-10-01), Kuniyoshi et al.
patent: 4170785 (1979-10-01), Yoshida et al.
patent: 4245237 (1981-01-01), Lagoni

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