Power supply independent all bipolar start up circuit for high speed bias generators
US6750699B2 · kind B2 · utility
0Cited by
6References
6Claims
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Key dates
| Filing date | Sep 21, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Sep 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/205
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A start up circuit includes: a diode Q0; a first transistor Q1 coupled in series with the diode Q0; a first resistor R4 coupled in series with the first transistor Q1; a second transistor Q2 having a control node coupled to a control node of the first transistor Q1 and coupled to a node between the first transistor Q1 and the first resistor R4; and a second resistor R2 coupled in series with the second transistor Q2 such that a current in the second transistor Q2 is independent of a voltage applied across the diode Q0, the first transistor Q1, and the first resistor R4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.