Exponential conversion circuit and variable gain circuit

Details Exponential conversion circuit and variable gain circuit Exponential conversion circuit and variable gain circuit

2005-08-16

2005-08-16

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Exponential

C327S359000, C327S563000

Reexamination Certificate

active

06930532

ABSTRACT:
In a master block, the exponential conversion characteristic is determined on the basis of a common mode reference voltage and a reference voltage. In a slave block, the exponential conversion characteristic determined with the master block is used to create a control voltage and a gain control signal on the basis of a common mode reference voltage and a reference voltage. For example, a gain of the variable gain amplifier is controlled by using this gain control signal.

REFERENCES:
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patent: 5278518 (1994-01-01), Debroux
patent: 5481218 (1996-01-01), Nordholt et al.
patent: 5867777 (1999-02-01), Yamaji et al.
patent: 5909136 (1999-06-01), Kimura
patent: 6215989 (2001-04-01), Otaka
patent: 6369618 (2002-04-01), Bloodworth et al.
patent: 6563383 (2003-05-01), Otaka et al.
patent: 6777999 (2004-08-01), Kanou et al.
patent: 11-88093 (1999-03-01), None

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