Circuit and method of sensing process and temperature variation

Details Circuit and method of sensing process and temperature variation Circuit and method of sensing process and temperature variation

1993-02-01

1994-10-25

Callahan, Timothy P.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307491, 328 3, 377 25, H01L 3100, G06G 710, H03K 1317

Patent

active

053592344

ABSTRACT:
A voltage controlled oscillator runs at full speed to generate an output frequency dependent on temperature and process variation. First and second clock signals are generated from the oscillator signal, while third and fourth clock signals are developed in response to an input clock signal. The number of clock signals occurring during a first state of the third clock signal are counted for providing a plurality of output signals also indicative of the temperature and process variation. The plurality of output signals compensate an input signal for the temperature and process variation for providing an output signal.

REFERENCES:
patent: 3603979 (1971-09-01), Kosakowski
patent: 3713033 (1973-01-01), Frerking
patent: 4237420 (1980-12-01), Ebihara et al.

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