Wideband frequency multiplier particularly adapted for use in badge readers and the like
US4063070A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Nov 12, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/156
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved wideband frequency multiplier characterized as follows: a saw-tooth signal generator supplying a saw-tooth wave having a frequency equal to the frequency to be multiplied, the level of the voltage wave varying between a reference level and a maximum which is related to the frequency to be multiplied; storage means for storing a voltage equal to, or closely approaching the maximum voltage value of the saw-tooth wave; a voltage divider having several outputs, each of which provides an output which is a given fraction of the stored voltage; a number of comparators each of which corresponds to and is coupled to an output of the voltage divider, each comparator comparing the instantaneous value of the saw-tooth voltage with the voltage supplied by the corresponding output of the voltage divider, and supplying a first level signal when said instantaneous value is lower than the voltage supplied by said corresponding output, and a second level signal when it is higher; and logical circuits combining the signals supplied by the comparators so as to give an output signal the frequency of which is a given multiple of the frequency of the saw-tooth signal. A timing circuit for a b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.