Pulse duration modulated signal transducer
US4065715A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Jul 2, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transducer for producing a pulse duration modulated signal in accord with the value of a parameter. A reference capacitor-resistance circuit is provided having a predetermined rate of capacitor discharge and a second capacitor-resistance circuit is provided having a capacitor and a resistor, one of which is varied in accordance with the parameter to define a rate of capacitor discharge determined by the parameter. Each of the capacitors is periodically charged in unison to a predetermined voltage. Respective level detectors monitor the capacitor voltage charges and generate respective digital signals when the voltage charge monitored is greater than a predetermined reference below which each capacitor discharges during the time interval between charges. A logic circuit monitors the digital signals and produces a series of pulses having durations determined by the value of the parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.