Voltage-frequency converter circuit with temperature compensation
US5585748A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/698
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a voltage-frequency converter having an integration circuit for integrating an input voltage signal in positive and negative directions, a first comparator is connected to switch integration direction of the integration circuit and a second comparator is connected to compare an integration output signal and a threshold signal. A delay circuit delays one of rising and falling edges of a second comparator output signal to be used as the threshold signal. The second comparator compares the delayed signal with a reference signal varying in accordance with a temperature and produces a second comparator output signal by which the integrating direction is switched. By the use of the delayed signal and the temperature dependent reference signal, a frequency change in the second comparator output signal caused by response time delays of the comparators is compensated for.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.