Start-stop oscillator having fixed starting phase and...

Details Start-stop oscillator having fixed starting phase and... Start-stop oscillator having fixed starting phase and...

H - Electricity

03

L

331/58

H03L 7/24 (2006.01) H03K 3/80 (2006.01)

Patent

CA 1295698

Abstract An amplifier having a resonator coupled between input and output terminals thereof supplies a dot clock signal to a character generator in a television receiver. A feedback control circuit supplies DC bias to the resonator during blanking intervals that preceed lines of characters to be displayed to ensure a consistent starting phase for oscillations, removes the DC bias and supplies operating power to the amplifier during a portion of the active video period of each displayed line for sustaining the oscillations and automatically inhibits the supply of amplifier power at the end of each active line of characters to thereby provide three oscillator operating modes of PRIMED, RUNNING and OFF so as to minimize overall power consumption for the oscillator for each field of displayed characters.

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