System and method for generating balanced modulated signals with arbitrary amplitude and phase control using modulation
US6768390B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2003 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C3/403
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Modulated differential (balanced) drive signals are created where, at least one of the signals can be controlled in phase relative to the other, and both of which could be controlled in amplitude and both of which have the same modulation envelope. In one embodiment, a coherent signal is generated in a first electronic signal generator (ESG) and applied to a second ESG. The coherent signal replaces the normal input signal of the second ESG and the I and Q inputs of the second ESG control the amplitude and phase of the output signal. This output signal is applied to a third ESG replacing the normal input signal to the vector modulator. The vector modulator is controlled by the same I and Q input as is the first ESG, thereby producing an output signal which has the same modulation envelope as the output signal from the first
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.