Error amplifier having cascode current source using body biasing
US8896379B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Apr 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45508
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is an error amplifier. The error amplifier includes: an amplifying unit receiving first and second input signals and amplifying a voltage difference between the received first and second input signals; a first voltage generating unit generating first and second driving voltages for driving the amplifying unit; a second voltage generating unit generating first and second body voltages to implement a body biasing method; a cascode current source including first to fourth PMOS transistors to provide a bias current to the amplifying unit and the first voltage generating unit; and an output unit outputting a signal of the voltage difference amplified by the amplifying unit, wherein the first and third PMOS transistors receive the first body voltage through a body terminal and the second and fourth PMOS transistors receive the second body voltage through a body terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.