Nested transimpedance amplifier
AssigneeMarvell World Trade Ltd.
InventorSehat Sutardja
Life of this patent
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Abstract
A nested transimpedance amplifier (TIA) circuit includes a zero-order TIA having an input and an output, and a first operational amplifier (opamp). The opamp includes an input that communicates with said output of said zero-order TIA, a first transistor driven by said input, a second transistor that is driven by a first bias voltage and communicates with said first transistor, a first current source that communicates with said second transistor, and an output at a node between the first transistor and the second transistor.
Claims11
A nested transimpedance amplifier (TIA) circuit, comprising:
- a zero-order TIA having an input and an output;
- and
- a first operational amplifier (opamp) comprising:
- an input that communicates with the output of the zero-order TIA;
- a first transistor driven by the input of the first opamp;
- a second transistor that is driven by a first bias voltage and communicates with the first transistor;
- a first current source that communicates with the second transistor;
- and
- an output at a node between the first transistor and the second transistor.
A nested differential mode transimpedance amplifier (TIA) circuit, comprising:
- a zero-order differential mode TIA including first and second inputs and first and second outputs;
- and
- a first differential mode operational amplifier (opamp) comprising:
- inputs that communicate with respective ones of the outputs of the zero-order differential mode TIA;
- a first transistor driven by a first the input;
- a second transistor driven by a second the input;
- a third transistor that is driven by a first bias voltage and communicates with the first transistor;
- a fourth transistor that is driven by the first bias voltage and communicates with the second transistor;
- a first current source that communicates with the third transistor;
- a second current source that communicates with the fourth transistor;
- and
- first and second outputs at respective connections between the first transistor and the third transistor, and between the second transistor and the fourth transistor.
A nested differential mode transimpedance amplifier (TIA) circuit, comprising:
- a zero-order differential mode TIA having first and second inputs and first and second outputs;
- and
- a differential-mode push-pull opamp having first and second inputs and first and second outputs, wherein the first and second inputs communicate with respective ones of the first and second outputs of the zero-order differential mode TIA.
Dependencies are inferred from the claim text.