US 2026/0135568 A1 · Recording module and its sigma-delta modulator (SDM)

Abstract

A sigma-delta modulator (SDM) is coupled to a driving circuit through a first input terminal and receives an intermediate signal outputted by the driving circuit. The SDM includes an operational amplifier, first and second sampling capacitors, and first and second integrating capacitors. The operational amplifier has a second input terminal, a third input terminal, and an output terminal. Two terminals of the first sampling capacitor are respectively coupled to the first and second input terminals for sampling the intermediate signal. Two terminals of the second sampling capacitor are respectively coupled to the first and second input terminals for sampling the intermediate signal. Two terminals of the first integrating capacitor are respectively coupled to the second input terminal and the output terminal. Two terminals of the second integrating capacitor are respectively coupled to the second input terminal and the output terminal.

Claims20

Dependent claims

A sigma-delta modulator (SDM), coupled to a driving circuit through a first input terminal and receiving an intermediate signal outputted by the driving circuit, the SDM comprising:

an operational amplifier having a second input terminal, a third input terminal, and an output terminal;
a first sampling capacitor, wherein two terminals of the first sampling capacitor are respectively coupled to the first input terminal and the second input terminal, and the first sampling capacitor is configured to sample the intermediate signal;
a second sampling capacitor, wherein two terminals of the second sampling capacitor are respectively coupled to the first input terminal and the second input terminal, and the second sampling capacitor is configured to sample the intermediate signal;
a first integrating capacitor, wherein two terminals of the first integrating capacitor are respectively coupled to the second input terminal and the output terminal;
and
a second integrating capacitor, wherein two terminals of the second integrating capacitor are respectively coupled to the second input terminal and the output terminal.

3 more elements

A recording module applied to an audio device and comprising:

a driving circuit configured to receive an input signal and generate an intermediate signal;
and
a sigma-delta modulator (SDM) coupled to the driving circuit and comprising:
an operational amplifier having a first input terminal, a second input terminal, and an output terminal;
a first sampling capacitor, wherein two terminals of the first sampling capacitor are respectively coupled to the driving circuit and the first input terminal, and the first sampling capacitor is configured to sample the intermediate signal;
a second sampling capacitor, wherein two terminals of the second sampling capacitor are respectively coupled to the driving circuit and the first input terminal, and the second sampling capacitor is configured to sample the intermediate signal;
a first integrating capacitor, wherein two terminals of the first integrating capacitor are respectively coupled to the first input terminal and the output terminal;
and
a second integrating capacitor, wherein two terminals of the second integrating capacitor are respectively coupled to the first input terminal and the output terminal.

6 more elements

Dependencies are inferred from the claim text.

Recording module and its sigma-delta modulator (SDM)

Life of this patent

Recording module and its sigma-delta modulator (SDM)

Life of this patent

Abstract

Claims20