Voltage control type control apparatus capable of achieving correct control characteristic without increasing interface line number
US6081150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Apr 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a control voltage producing apparatus, either a pulse-duration modulation signal or a pulse-width modulation signal, which are generated in response to a digital control signal, is from a first buffer circuit to an averaging circuit so as to be averaged. A power supply voltage is supplied from a first voltage source to this first buffer circuit. Then, the averaged signal is supplied to a control voltage producing circuit for producing a target control voltage. When a control voltage is produced, the same output voltage as that of the first buffer circuit is generated by a second buffer circuit, and then is supplied to the control voltage generating circuit and an operation control circuit. In response to the output voltage derived from the second buffer circuit, the operation control circuit applies the power supply voltage to the control voltage producing circuit so as to cause this control voltage producing circuit to be operable. Also, the control voltage producing circuit uses the output voltage derived from the second buffer circuit as the reference voltage so as to regulate the control voltage. As a consequence, in response to one of the output voltages derived from the se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.