Current integrator and related signal processing system
AssigneeNovatek Microelectronics Corp.
InventorsChieh-An Lin, Yen-Ru Kuo, Jhih-Siou Cheng, Ju-Lin Huang
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Abstract
A current integrator includes an operational amplifier, an integration capacitor and an offset cancelation capacitor. The operational amplifier includes a first input stage and a second input stage. The first input stage is coupled to an input terminal of the current integrator. The integration capacitor is coupled between the first input stage of the operational amplifier and an output terminal of the current integrator. The offset cancelation capacitor is coupled to the second input stage of the operational amplifier.
Claims19
A current integrator, comprising:
- an operational amplifier, comprising:
- a first input stage, coupled to an input terminal of the current integrator;
- and
- a second input stage;
- an integration capacitor, coupled between the first input stage of the operational amplifier and an output terminal of the current integrator;
- and
- an offset cancelation capacitor, coupled to the second input stage of the operational amplifier.
A signal processing system, comprising:
- an analog-to-digital converter (ADC);
- and
- a plurality of current integrators, each coupled to the ADC and comprising:
- an operational amplifier, comprising:
- a first input stage, coupled to one input terminal of the plurality of the current integrators;
- and
- a second input stage;
- an integration capacitor, coupled between the first input stage of the operational amplifier and an output terminal of the current integrator;
- and
- an offset cancelation capacitor, coupled to the second input stage of the operational amplifier.
Dependencies are inferred from the claim text.