Voltage generator and bandgap reference circuit
US8933684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2012 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | May 31, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/185
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage generator includes a first transistor, a second transistor, an operational amplifier, a capacitor, a third transistor, a fourth transistor and a first resistor. The operational amplifier includes a first terminal coupled to a second terminal of the first transistor, and a second terminal coupled to a second terminal of the second transistor. The capacitor is coupled between an output terminal of the operational amplifier and a ground terminal. The third transistor is coupled to the first transistor and the output terminal of the operational amplifier. The fourth transistor is coupled to the second transistor, the output terminal of the operational amplifier and the ground terminal. The first resistor is utilized for generating a complementary to absolute temperature voltage according to a voltage difference between a gate-source voltage of the third transistor and a gate-source voltage of the fourth transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.