Bootstrap circuit
AssigneeKeishin Matsumoto, Director-General, Agency of Industrial Science and Technology
InventorAkira Takei
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Abstract
A bootstrap circuit is disclosed which has capacitors, each connected between the base of a collector grounded transistor and the ground and between the emitter and the base of the same transistor and converts a rectangular input signal train into a sawtooth wave signal train. The bootstrap circuit is further provided with a switching circuit connected in series with the capacitor connected between the emitter and the base of the transistor and the switching circuit is opened when the supply of the rectangular input signal is stopped.
Claims4
A bootstrap circuit for converting a series of rectangular input signal trains, successive said trains being separated by a predetermined time interval, into a corresponding series of separated sawtooth wave signal trains, comprising:
- a voltage source;
- an emitter follower transistor having an emitter, a collector, a base, and being responsive to each rectangular input signal of said signal trains being received at said base thereof;
- a first capacitor electrically connected between the base of said emitter follower transistor and said voltage source;
- a second capacitor electrically connected in a feedback loop between said base and said emitter of said emitter follower transistor;
- wherein the improvement comprises a switching circuit connected in series with said second capacitor in said feedback loop for opening said feedback loop during said time interval between successive said rectangular input signal trains.
Dependencies are inferred from the claim text.