Low offset, fast response voltage controlled current source and controlling method thereof
US8710819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Dec 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/561
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention relates to a low offset and fast response voltage controlled current source, controlling method, and a power supply thereof. In one embodiment, a voltage controlled current source can include: a clock signal generator, a first operational amplifier, an input offset eliminator, a sampling and holding circuit, and an output circuit. The input offset eliminator can receive a clock signal, an input voltage, and a feedback voltage, and can (i) store and then eliminate an input offset of the first operation amplifier, and generate an error signal in accordance with an error between the input and feedback voltages when the clock signal is active, and (ii) generate the error signal in accordance with the stored input offset and the error between the input and feedback voltages when the clock signal is inactive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.