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US 6,310,519 B1Granted
Method and apparatus for amplifier output biasing for improved overall temperature stability
AssigneeMitsubishi Electric & Electronics USA, Inc.
InventorRobert Ross
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Abstract
An amplifier output is biased to optimize performance characteristics such as gain and output voltage. A temperature-independent current is subtracted from a temperature-dependent current. The difference is injected at the amplifier output to bias the amplifier output such that performance characteristics are enhanced. An additional amplifier stage may be used to prevent the bandwidth performance of the amplifier from being affected by the current injection.
Claims16
An apparatus for biasing an amplifier output, comprising:
- a subtraction circuit for subtracting a temperature-independent current from a temperature-dependent current to produce a difference current;
- and
- a current injection circuit for injecting the difference current at the output of the amplifier to bias the amplifier output and enhance performance characteristics.
A method for biasing an amplifier output, comprising the steps of:
- subtracting a temperature-independent current from a temperature-dependent current to produce a difference current;
- and
- injecting the difference current at the output of the amplifier to bias the amplifier output and enhance performance characteristics.
Dependencies are inferred from the claim text.