Amplifier circuit

An integrated circuit comprising:

• an equalizer circuit, including:
• a first high-pass path electrically coupled between a first signal input terminal and a first node, wherein the first high-pass path includes a first resistive circuit and a first capacitive circuit that are configured to amplify a gain of a high frequency part of a first input signal provided by a first signal source to the first signal input terminal;
• a first low-pass path electrically coupled between the first signal input terminal and a second node, wherein the first low-pass path includes a second resistive circuit;
• a second low-pass path electrically coupled between a second signal input terminal and a third node, wherein the second low-pass path includes a third resistive circuit;
• and
• a second high-pass path electrically coupled between the second signal input terminal and a fourth node, wherein the second high-pass path includes a fourth resistive circuit and a second capacitive circuit that are configured to amplify a gain of a high frequency part of a second input signal provided by a first signal source to the second signal input terminal;
• an adjustable gain circuit, including:
• a first variable resistive circuit electrically coupled between the second node and the third node;
• a second variable resistive circuit electrically coupled between the first node and the second node;
• and
• a third variable resistive circuit electrically coupled between the third node and the fourth node;
• and
• a filter circuit configured to amplify and filter the first signal source and the second signal source, wherein the filter circuit includes:
• a fully differential operational amplifier having a first input terminal, a second input terminal, a first output terminal and a second output terminal;
• a first filter network electrically coupled to the first input terminal, the first output terminal and the first node;
• and
• a second filter network electrically coupled to the second input terminal, the second output terminal and the fourth node.