Broadband adjustable phase modulation circuit
US4549152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C7/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase modulation circuit to provide at an output terminal an output signal controllably shifted from 0.degree. to 360.degree. relative to an input signal provided at an input terminal includes a first 90.degree. coupler connected between the input terminal and second and third 90.degree. couplers, four gain controllable amplifiers, fourth and fifth 90.degree. couplers and an in phase combiner with its output connected to the output terminal. Two of the amplifiers are connected between the second and fourth couplers. The additional amplifiers are connected between the third and fifth couplers. The fourth and fifth couplers are connected to the inputs of the in-phase combiner. The gain through the various amplifiers is adjusted to control the amount of phase shift through the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.