Patent ID: 8466741

Claim:
An integrated circuit comprising: a first transimpedance amplifier comprising: an input transistor connected to an input node; a first transistor coupled in cascode to the input transistor; a first resistor having a first end connected to the input node and a second end connected to a feedback node; and a switch for switching the first transimpedance amplifier between an enabled state and a disabled state; and a second transimpedance amplifier comprising: the input transistor; a second transistor coupled in cascode to the input transistor; the first resistor; a second resistor having a first end and a second end; and a switch for switching the second transimpedance amplifier between an enable state and a disabled state, wherein the first end of the second resistor is connected to the second end of the first resistor, and the second end of the second resistor is connected to a feedback node of the second transimpedance amplifier.