Amplifier for improving open-loop gain and bandwidth in a switched capacitor system
US6486821B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/086
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is disclosed an amplifier for operating from a power supply having a first voltage level. The amplifier comprises: 1) a plurality of thick-oxide field effect transistors, each of the plurality of thick-oxide field effect transistors having a relatively thick oxide layer and fabricated using a first process such that the each thick-oxide field effect transistor can withstand a gate-to-source difference, a gate-to-drain difference, and a gate-to-bulk difference at least equal to a first maximum operating voltage, wherein the first. maximum operating voltage is at least equal to the first voltage level; and 2) a first thin-oxide field effect transistor coupled to a first input of the amplifier, the first thin-oxide field effect transistor having a relatively thin oxide layer and fabricated using a second process such that the first thin-oxide field effect transistor can withstand a gate-to-source difference, a gate-to-drain difference, and a gate-to-bulk difference at least equal to a second maximum operating voltage, wherein the second maximum operating voltage is less than the first voltage level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.