Wide dynamic range transimpedance amplifier
AssigneeSirenza Microdevices, Inc.
InventorKevin Wesley Kobayashi
Life of this patent
Estimating the term…
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 dynamic range of the amplifier circuit by adjusting the input signal based on (i) a loop gain of the control circuit and (ii) the reference voltage.
Claims20
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 control a dynamic range of said amplifier circuit by adjusting said input signal in response to (i) a loop gain of said control circuit and (ii) said reference voltage.
A control circuit configured to control an amplifier configured to generate an amplified signal in response to an input signal, said 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;
- a feedback device configured between said input signal and a ground, wherein said feedback device is configured to limit said input signal and said control circuit adjusts said input signal in response to a magnitude of said amplified signal and said reference voltage;
- and
- a monitor circuit comprising a current mirror configured to generate a monitor current linearly proportional to received optical power in response to said amplified signal.
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 said dynamic range by adjusting said input signal in response to a control circuit loop gain and a reference voltage, wherein said control circuit comprises a differential amplifier having (i) a first input coupled to said amplified signal and (ii) a second input coupled to said reference voltage.
Dependencies are inferred from the claim text.