Variable gain stage having same input capacitance regardless of the stage gain
US7961127B2 · kind B2 · utility
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6References
26Claims
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Key dates
| Filing date | Jul 23, 2007 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Apr 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0094
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable gain amplifier (PGA) includes a sample-and-hold (S&H) stage which provides an input capacitance value for storing a charge. The PGA also includes an amplifying stage, which has a gain dependent on the input capacitance value. The amplifying stage is configured to provide a variable gain, while the S&H stage is configured to provide a substantially constant input capacitance value, regardless of the gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.