Temperature compensation for logarithmic circuits

Details Temperature compensation for logarithmic circuits Temperature compensation for logarithmic circuits

2011-06-28

2011-06-28

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Logarithmic

C327S378000, C327S346000

Reexamination Certificate

active

07969223

ABSTRACT:
An embodiment of a logarithmic circuit may include a logging transistor, and a multi-tanh circuit arranged to provide temperature compensation to the logging transistor, where the multi-tanh circuit comprises a multiplicity of multi-tanh cells. In another embodiment, a logarithmic circuit may include a logging transistor, and a multi-tanh circuit arranged to provide temperature compensation to the logging transistor, where the multi-tanh circuit includes a first set of outputs arranged to provide an output signal and a second set of one or more outputs that are diverted.

REFERENCES:
patent: 3992622 (1976-11-01), Numata et al.
patent: 4604532 (1986-08-01), Gilbert
patent: 5327029 (1994-07-01), Ericson et al.
patent: 5699004 (1997-12-01), Picciotto
patent: 7310656 (2007-12-01), Gilbert
patent: 7342407 (2008-03-01), Kuwana et al.
AD8304 Data Sheet, Analog Devices, 160 dB Logarithmic Amplifier with Photo-Diode Interface, Data Sheet, 2002, pp. 1-20.
Gilbert, Barrie, “The Multi-tanh Principle: A Tutorial Overview,” IEEE, 1998, 16 pages.

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