Specifying mixers as phase detectors
Abstract
In systems requiring phase information, mixers are very often used to measure or compare the phase state between two signals. In principle, on the basis of ideal device characteristics, any mixer with a DC-coupled port could be used as a phase detector. In practice, however, mixers display frequently some very nonideal characteristics when used as phase detectors. The selection of the actual mixer for a particular application often depends on the degree to which these nonideal characteristics can be tolerated. The phase detection process is examined mathematically and a description is presented of guidelines for the mixer selection procedure. Attention is given to the range of linear response, mixer-to-mixer variations in DC offset voltage, the minimization of the DC offset, and design improvements involving a change of phase.
- Publication:
-
Microwaves
- Pub Date:
- January 1978
- Bibcode:
- 1978MicWa..17...80K
- Keywords:
-
- Mixing Circuits;
- Phase Detectors;
- Phase Shift;
- Signal Detection;
- Diodes;
- Direct Current;
- Linear Receivers;
- Electronics and Electrical Engineering