Electrical angle delay circuit
US3988618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1974 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Nov 1, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00286
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Schmitt trigger circuit produces synchronizing signals during and of a pulse width equal to the positive half cycles of an alternating current input signal. A monostable multivibrator circuit is triggered to the alternate state by the leading edge of each synchronizing signal and the resulting series of alternate state output signals charges a capacitor to a direct current potential level range signal directly proportional to the frequency of the input signal. A direct current potential ramp timing signal generating circuit, which is reset and disenabled by the leading edge and enabled by the trailing edge of the synchronizing signals, generates a timing signal which increases linearly in potential level at a rate determined by the range signal. A potential level detector circuit responsive to the timing signal and a delay signal of a selectable direct current potential level produces an output signal when the potential level of the timing signal increases to that of the delay signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.