Function generator and temperature compensated crystal...

Details Function generator and temperature compensated crystal... Function generator and temperature compensated crystal...

2006-03-21

2006-03-21

Kinkead, Arnold (Department: 2817)

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

C331S158000, C331S1160FE, C331S1160FE, C331S066000

Reexamination Certificate

active

07015767

ABSTRACT:
With first, second and third current exchanger circuits cascaded, a current in proportion to a difference between an ambient temperature Ta and a reference temperature Tr is input to the first current exchanger circuit. The first current exchanger circuit supplies a current in proportion to the square of Ta−Tr to the second current exchanger circuit, the second current exchanger circuit supplies a current in proportion to the fourth power of Ta−Tr to the third current exchanger circuit, and the third current exchanger circuit outputs a current in proportion to the fifth power of Ta−Tr. Each of the first, second and third current exchanger circuits has a configuration which does not require a high supply voltage enough to drive a series circuit of three or more diodes.

REFERENCES:
patent: 5719533 (1998-02-01), Shibuya et al.
patent: P2003-8386 (2003-01-01), None

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