Trimmable circuitry for providing compensation for the temperatu

Details Trimmable circuitry for providing compensation for the temperatu Trimmable circuitry for providing compensation for the temperatu

1997-07-31

1999-10-05

Kinkead, Arnold

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331186, 331177R, 331 17, 331 1R, H03B 504

Patent

active

059631058

ABSTRACT:
In an integrated crystal-less device that generates an output signal with the frequency of the output signal dependent at least in part on a resistive element, there is provided circuitry for providing compensation for the temperature coefficient the of resistive element, the circuitry includes a bandgap reference and a resistive network. The bandgap reference utilizes components having stable temperature coefficient to generate a first voltage, a reference voltage, and also to generate second voltage, a voltage proportional to absolute temperature. The resistive network includes two trimmable resistors, which are trimmed such that the resistive network in combination with the bandgap reference compensates for the absolute value of the resistive element in a selected temperature range.

REFERENCES:
patent: 3388344 (1968-06-01), West

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