Vertical ramp wave generating circuit
AssigneeSanyo Electric Co., Ltd.
InventorKenichi Nakajima
Life of this patent
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Abstract
The invention includes: a capacitor 11 for generating ramp wave; a constant current source 10 for supplying constant current to the capacitor 11 for generating ramp wave; voltage fixing means for charging the capacitor 11 for generating ramp wave and for fixing a terminal of the capacitor 11 by force to a designated reference voltage Vref; and a counter circuit 15 enabling to output control signal having pulse width corresponding to desired waiting time, and that terminal voltage 17 of capacitor 11 for generating ramp wave is fixed to reference voltage while waiting time set by the counting circuit 15.
Claims5
A vertical ramp wave generating circuit for generating ramp wave for vertical deflection characterized by that the vertical ramp wave generating circuit includes:
- a capacitor for generating ramp wave;
- a constant current source for supplying constant current to said capacitor for generating ramp wave;
- voltage fixing means for discharging said capacitor for generating ramp wave and for fixing a terminal of the capacitor by force to designated reference voltage;
- and a counting circuit enabling to output control signal having pulse width corresponding to desired waiting time,
- and that terminal voltage of said capacitor for generating ramp wave is fixed to said reference voltage while waiting time set by said counting circuit, by operating said voltage fixing means corresponding to control signal output by said counting circuit.
Dependencies are inferred from the claim text.