Cambridge Silicon Radio Limited

MIchael Story

Gerald Miaille

A transimpedance amplifier includes a current regulator having a first current mirror of a first conduction type and a first current mirror of a second conduction type. The first current mirror stage of a first conduction type receives a reference current. The first current mirror stage of a second conduction type is connected to the first current mirror stage of the first conduction type, and receives an output current from the first current mirror stage of the first conduction type, and to generate a current to be used as a current source by a transimpedance amplifier. Each of the current mirror stages includes a first transistor and a second transistor of the same conduction type having their gate terminals connected wherein the first transistor receives an input current and the second transistor provides an output current that is a factor of the received input current.

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MIchael Story