Transimpedance amplifier with integrated reconfigurable filter

An integrated circuit comprising:

• a mixer configured to down-convert a radio frequency (RF) signal;
• and
• a transimpedance amplifier coupled to the mixer, the transimpedance amplifier comprising:
• a first operational amplifier, wherein a first input terminal of the first operational amplifier is coupled to an output terminal of the mixer;
• a first resistor coupled between the first input terminal of the first operational amplifier and a first output terminal of the first operational amplifier;
• a second operational amplifier;
• a second resistor coupled between the first output terminal of the first operational amplifier and a first input terminal of the second operational amplifier;
• and
• a first reconfigurable filter coupled between the first input terminal of the second operational amplifier and a first output terminal of the second operational amplifier, wherein the first reconfigurable filter is configured to, under control of a first control signal, switch between a first-order high-pass filter and a second-order high-pass filter.

A transimpedance amplifier comprising:

• a first operational amplifier;
• a second operational amplifier;
• a first resistor coupled between a first input terminal of the first operational amplifier and a first output terminal of the first operational amplifier;
• a second resistor coupled between the first output terminal of the first operational amplifier and a first input terminal of the second operational amplifier;
• and
• a capacitor-resistor-capacitor (CRC) network coupled between the first input terminal of the second operational amplifier and a first output terminal of the second operational amplifier, comprising:
• a first capacitor coupled between an input terminal of the CRC network and a node;
• a second capacitor coupled between the node and an output terminal of the CRC network;
• and
• a third resistor coupled between the node and a reference voltage node.