One shot pulse width modulating converter
US4594578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Aug 22, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/52
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A one shot voltage to pulse width converter is provided for producing a digital representation of an analog input signal voltage. The circuit includes an integrating amplifier circuit whose output is kept at a reference potential except when it is being ramped up in response to connection of an input signal to the integrating amplifier during a fixed input sample period or down after the fixed input sample period expires. The circuit also includes a comparator connected to compare the output of the integrating amplifier to the reference potential with the output of the comparator switching an output circuit between two different levels so that the pulse width of the output is related to the magnitude of the input signal. When the input signal is not connected to the integrating amplifier its output is held at reference potential by a negative feedback from the comparator output to the integrating circuit input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.