HIGH GAIN, HIGH BANDWIDTH CMOS TRANSIMPEDANCE AMPLIFIER
First Claim
Patent Images
1. An amplifier comprising:
- a first shunt-shunt feedback stage;
a voltage amplifier stage coupled to the first shunt-shunt feedback stage; and
a second shunt-shunt feedback stage coupled to the voltage amplifier stage.
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Abstract
A three-stage transimpedance amplifier, where the first stage is a shunt-shunt feedback amplifier, the second stage is a simple voltage amplifier, and the third stage is a shunt-shunt feedback amplifier. The third stage comprises a pMOSFET serially connected with a nMOSFET, where their gates are connected together and to the output port of the second stage, and comprises a feedback pMOSFET or resistor to provide negative feedback from the drains of the pMOSFET and nMOSFET to the output port of the second stage.
7 Citations
17 Claims
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1. An amplifier comprising:
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a first shunt-shunt feedback stage;
a voltage amplifier stage coupled to the first shunt-shunt feedback stage; and
a second shunt-shunt feedback stage coupled to the voltage amplifier stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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12. A computer system comprising:
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a photodetector comprising an output port; and
an amplifier comprising an input port coupled to the output port of the photodetector, the amplifier comprising;
a first shunt-shunt feedback stage;
a voltage amplifier stage coupled to the first shunt-shunt feedback stage; and
a second shunt-shunt feedback stage coupled to the voltage amplifier stage. - View Dependent Claims (13, 14)
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15. An transimpedance amplifier comprising:
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a first stage comprising a common-source amplifier comprising a transistor, the transistor comprising a gate and a drain; and
a feedback element coupling the drain of the transistor to the gate of the transistor to provide negative feedback;
a second stage comprising a common-source amplifier comprising a transistor, the transistor in the second stage comprising a gate connected to the drain of the transistor in the first stage and comprising a drain; and
a third stage comprising;
a nMOSFET comprising a drain and comprising a gate connected to the drain of the transistor in the second stage;
a pMOSFET comprising a gate and a drain connected, respectively, to the gate and to the drain of the nMOSFET; and
a feedback element coupling the drain of the nMOSFET to the gate of the nMOSFET. - View Dependent Claims (16, 17)
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Specification