Piece-wise linear approximation of a dB linear programmable gain

Details Piece-wise linear approximation of a dB linear programmable gain Piece-wise linear approximation of a dB linear programmable gain

1996-04-16

1997-12-30

Tran, Taon

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327346, G06G 712

Patent

active

057035245

ABSTRACT:
A programmable gain amplifier which can be realized using CMOS transistors. The amplifier provides a plurality of linear gain segments, with each of the gain segments having a different gain. A particular combination of the gain segments are selected using a digital control input to give an approximation of a linear dB output. By appropriately choosing the segments and how they combine, an approximation that is accurate to the least significant bit of a digital system can be provided.

REFERENCES:
patent: 4360786 (1982-11-01), Rehfeldt
patent: 5045804 (1991-09-01), Sugawara et al.
patent: 5442311 (1995-08-01), Trafton
patent: 5463349 (1995-10-01), Petersen et al.
patent: 5619169 (1997-04-01), Matsuura

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