Integrating Circuit and Signal Processing Module

A signal processing module, comprising:

• a switching mixer;
• an analog-to-digital converter;
• an integrating circuit, coupled between the switching mixer and the analog-to-digital converter, the integrating circuit comprises:
• an operational amplifier;
• an integrating capacitor unit, coupled to an output terminal and a first input terminal of the operational amplifier;
• and
• an adjustable module, coupled between the first input terminal of the operational amplifier and an integrating input terminal of the integrating circuit, wherein the adjustable module is controlled by a plurality of signals, to adjust a resistance value or a capacitance value of the adjustable module.

An integrating circuit, comprising:

• a first operational amplifier;
• an adjustable integrating capacitor module, coupled between a first input terminal and an output terminal of the first operational amplifier, wherein the adjustable integrating capacitor module comprises a plurality of integrating-capacitor-selecting units, and each integrating-capacitor-selecting unit comprises an integrating capacitor and at least a switch;
• and
• a voltage following module, coupled to the plurality of integrating-capacitor-selecting units of the adjustable integrating capacitor module;
• wherein the adjustable integrating capacitor module is configured to receive a plurality of control signals, to adjust a capacitance value between the first input terminal and the output terminal.