Claims
- 1. A bias control circuit for adjusting an input bias voltage for each of a plurality of amplifying devices comprising:
- a digital control circuit for converting a plurality of analog output current bias signals into a plurality of equivalent digital output current bias signals, for generating a plurality of digital input bias levels for each one of the amplifying devices based on the associated digital output current bias signal from each of the amplifying devices, and for converting the digital input bias levels into a plurality of equivalent analog input bias levels;
- a plurality of bias current sample means, each one of said bias current sample means being associated with one of the amplifying devices for periodically gating the analog output current bias signal to said digital control circuit;
- a plurality of input bias means, each one of said bias means being associated with one of the amplifying devices for periodically biasing an input with the associated analog input bias level generated by said digital control circuit, whereby the amplifying devices are maintained at a desired operating point; and
- a timing circuit means for periodically gating said digital control circuit, said plurality of bias current sample means, and said plurality of input bias means.
Parent Case Info
This is a continuation of application Ser. No. 08/243,161 filed May 16, 1994.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4794343 |
Yang |
Dec 1988 |
|
5101173 |
DiPiazza et al. |
Mar 1992 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
243161 |
May 1994 |
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