Oscillation circuit

Details Oscillation circuit Oscillation circuit

2009-12-17

2011-12-06

Kinkead, Arnold (Department: 2817)

Oscillators

Ring oscillators

C331S074000, C331S183000, C327S261000, C327S156000, C327S159000

Reexamination Certificate

active

08072274

ABSTRACT:
A differential oscillation circuit according to the present invention is a differential oscillation circuit including a feedback loop circuit. The differential oscillation circuit includes: delay, circuits, cascade-connected one after another on the feedback loop circuit, each delay circuit configured to delay paired differential input signals which the delay circuit receives, and to output the delayed differential signals as paired differential output signals; and an oscillation activation detector circuit configured to detect whether the oscillation circuit is in an oscillation activation state or in a stable state, and to output a detection signal indicating a result of the detection. Furthermore, on the basis of the detection signal outputted from the oscillation activation detector circuit, each of the delay circuits controls output current values of the differential output signals. This circuit configuration enables the speeding up of the oscillation frequency of the circuit.

REFERENCES:
patent: 5903195 (1999-05-01), Lukes et al.
patent: 2001-358565 (2001-12-01), None

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