Patent ID: 6147566
Filing Date: 2000-11-14
Classification: H02M,H03K

Abstract:
An oscillator circuit for producing first and second oscillating logic signals that are of a same frequency and are non-overlapping in a first logic state, the oscillator comprising:a flip-flop circuit to produce third and fourth oscillating logic signals of opposite polarities, the flip-flop circuit being driven by first and second driving logic signals;first and second logic gates receiving the third and fourth logic signals, respectively, and producing the first and second oscillating logic signals, logic state transitions in the first and second oscillating logic signals being produced as a function of logic state transitions of the third and fourth logic signals, and the first and second logic gates being organized so as to introduce a delay into the logic state transitions from a second logic state to the first logic state in the first and second oscillating logic signals, with respect to transitions in the third and fourth logic signals; andfirst and second RC type circuits each coupled to the flip-flop circuit, to respectively produce the first and second driving logic signals to control the transitions in the third and fourth logic signals,wherein a first switch-over threshold level of the flip-flop circuit is different from a second switch-over threshold level of each of the first and second logic gates.