Patent ID: 6621319
Filing Date: 2003-09-16
Classification: H03K

Abstract:
A toggle flip-flop circuit comprisinga bistable circuit element having first and second output terminals exhibiting respective complementary first and second binary output voltages, and triggering means for selectively coupling transitions of a predetermined polarity in an input signal to said bistable circuit element to initiate a change of state for said bistable circuit from a present output state to a complementary output state, said change of state causing both said first and second terminals to change binary output voltages, said triggering means comprising a first capacitor having a first terminal selectively connected to a reference voltage through a first switch controlled by the voltage on said first output of said bistable circuit element, a second capacitor having a first terminal selectively connected to a reference voltage through a second switch controlled by the voltage on said second output of said bistable circuit element, each of said first and second capacitors having a second terminal connected to said input signal, the one of said first and second switches controlled by predetermined voltage representing a predetermined binary state of said bistable circuit element connecting said transitions in said input signal to said bistable circuit element.