Series resistance compensation in translinear circuits
US6121824A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A subcircuit including three bipolar transistors is substituted in place of a single bipolar transistor to achieve extrinsic base and emitter series resistance compensation in translinear circuits. The subcircuit substitution is applied to a Brokaw-type bandgap cell. The subcircuit substitution is applied to a current multiplier circuit, and the resulting circuit is rearranged for external control circuit efficiency. A low-voltage bandgap circuit uses an operational amplifier feedback circuit with bipolar transistors having differing emitter areas and a voltage divider to generate base voltages for a Brokaw-type bandgap cell. A proportional-to-absolute-temperature sensor circuit uses parallel two stacked bipolar transistor paths in which the bipolar transistors' emitter areas are selected to adhere to a relationship so as to provide extrinsic series base and emitter resistance compensation. A proportional-to-absolute-temperature sensor circuit and a bandgap reference circuit use parallel three stacked bipolar transistor paths in which the bipolar transistors' emitter areas are selected to adhere to a relationship so as to provide extrinsic series base and emitter resistance compens…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.