Semiconductor integrated circuit with function to detect...

Details Semiconductor integrated circuit with function to detect... Semiconductor integrated circuit with function to detect...

2007-12-18

2007-12-18

Lee, Benny (Department: 2817)

Oscillators

Amplitude control or stabilization

Automatic

C331S064000, C331S074000, C331S160000

Reexamination Certificate

active

11272068

ABSTRACT:
A semiconductor integrated circuit includes a reference-voltage circuit configured to produce a predetermined reference voltage at an output node thereof, a comparator, coupled to a node to which an oscillating signal is supplied and to the output node of the reference-voltage circuit, to produce a result of comparison at an output node thereof, the result of comparison being made by comparing a voltage of the oscillating signal with the predetermined reference voltage, and a detection circuit coupled to the output node of the comparator to produce, in response to the result of comparison, a stable-state-detection signal indicating that the oscillating signal has an amplitude larger than the reference voltage.

REFERENCES:
patent: 3553531 (1971-01-01), Rimondini et al.
patent: 5369311 (1994-11-01), Wang et al.
patent: 5673424 (1997-09-01), Sawamura
patent: 6414559 (2002-07-01), Cole et al.
patent: 6798301 (2004-09-01), Balan et al.
patent: 2003-216265 (2003-07-01), None

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