Patent ID: 6882198
Filing Date: 2005-04-19
Classification: H03K

Abstract:
1. A toggle flip-flop circuit comprising a bistable element having first and second output terminals exhibiting respective complementary first and second binary output voltages, and triggering means for initiating a change of state for said bistable element 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 connected to a reference voltage and a second terminal connected through a first switch to said first output of said bistable element, a second capacitor having a first terminal connected to said reference voltage and a second terminal connected through a second switch to said second output of said bistable element, said first and second switches controlled by a binary input signal such that when said binary input signal is in a first state said switches connect said second terminal of respective ones of said capacitors to respective outputs of said bistable element when said binary input signal is in a second state said switches disconnect said capacitors from said respective outputs of said bistable element, means responsive to said voltages at said capacitors for switching the binary state of said bistable element, and means for inhibiting transitions in said input signal from affecting said means responsive to voltages at said capacitors for switching the binary state of said bistable element.