Wide dynamic range transimpedance amplifier
AssigneeSirenza Microdevices, Inc.
InventorKevin Wesley Kobayashi
Life of this patent
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Abstract
An apparatus comprising an amplifier circuit and a control circuit. The amplifier circuit may be configured to generate an amplified signal in response to an input signal. The control circuit generally comprises a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage. The control circuit may be configured to control a gain of the amplifier circuit by adjusting the input signal based on (i) a magnitude of the amplified signal and (ii) the reference voltage.
Claims27
An apparatus comprising:
- an amplifier circuit configured to generate an amplified signal in response to an input signal;
- and
- a control circuit comprising a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage, wherein said control circuit is configured to (a) control a gain of said amplifier circuit by adjusting said input signal based on (i) a magnitude of said amplified signal and (ii) said reference voltage and (b) improve linearity of said amplified signal.
An apparatus comprising:
- an amplifier circuit configured to generate an amplified signal in response to an input signal;
- a control circuit comprising (a) a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage and (b) an output circuit configured to contribute to controlling said amplifier by averaging an output of said differential amplifier, wherein said control circuit is configured to control a gain of said amplifier circuit by adjusting said input signal based on (i) a magnitude of said amplified signal and (ii) said reference voltage.
A method for implementing an amplifier with wide dynamic range comprising the steps of:
- (A) generating an amplified signal in response to an input signal;
- and
- (B) controlling a gain of said amplifier and improving linearity of said amplified signal by adjusting said input signal based on a magnitude of said amplified signal with a differential amplifier having a control circuit comprising a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage.
An apparatus comprising:
- an amplifier circuit configured to generate an amplified signal in response to an input signal;
- and
- a control circuit comprising a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage, wherein said control circuit is configured to (a) control a gain of said amplifier circuit by adjusting said input signal based on (i) a magnitude of said amplified signal and (ii) said reference voltage and (b) reduce distortion of said amplified signal.
An apparatus comprising:
- an amplifier circuit configured to generate an amplified signal in response to an input signal;
- and
- a control circuit comprising (a) a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage and (b) a feedback device configured between said input signal and ground, wherein (i) said feedback circuit is configured to limit the input signal by shunting a portion of said input signal to ground and (ii) said control circuit is configured to control a gain of said amplifier circuit by adjusting said input signal based on (i) a magnitude of said amplified signal and (ii) said reference voltage.
An apparatus comprising:
- an amplifier circuit configured to generate an amplified signal in response to an input signal;
- and
- a control circuit comprising a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to a reference voltage, wherein said control circuit is configured to (a) control a gain of said amplifier circuit by adjusting said input signal based on (i) a magnitude of said amplified signal and (ii) said reference voltage and (b) minimize a DC offset of said input signal and inhibit propagation of duty-cycle distortion and intersymbol interference (ISI).
Dependencies are inferred from the claim text.