Self-biased cascode current mirror having high voltage swing and low power consumption
US5359296A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Sep 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/26
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A self-biased cascode current mirror includes a current mirror (60), and a cascode bias generator (50). The cascode bias generator (50) includes a resistor (51) to provide a bias voltage for the current mirror (60). The current mirror (60) includes cascode transistor (64) and two mirror transistors (62, 63). The bias voltage is approximately equal to a minimum saturation voltage of the cascode transistor (64) plus a gate-source voltage of the transistor (63) of the current mirror (60). The self-biased cascode current mirror (60) has a high output impedance and high voltage swing while providing low power consumption and requiring a small layout area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.