Low voltage wide ratio current mirror
US7170337B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Apr 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/267
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A low voltage wide ratio current mirror circuit comprises an n times current mirror having an input port for receiving an input current and an m times current mirror coupled in series to the n times current mirror for resulting in an output current of (N*M the input current) being provided to a load where at least one of N and M is other than 1. The circuit provides precision in output current for use with a low voltage power amplifier without incurring an overhead of quiescent current. The low voltage wide ratio current mirror circuit in accordance with a second embodiment of the invention includes a voltage swing reduction circuit in order to provide increased stability thereto. In additional embodiments of the invention, the load is a differential amplification stage for providing differential amplification to differential RF input signals received at first and second RF input ports thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.