LOW FREQUENCY PARAMETRIC AMPLIFIERS
MAINE UNIV AT ORONO
Pagination or Media Count:
A study of four-frequency parametric amplifiers indicates that the terminating admittance on the idler port can be used to modify the amplifier response at the input and output ports. An analytical investigation of methods of designing idler terminations that would result in broadbanding the amplifier was made and resulted in some success. Attempts to develop a low frequency analogue of such an amplifier in order to obtain experimental verification of the analytically derived results pointed up several problems in the idealized model used. In particular, the attempt to absorb the static capacitance of the varactor in the termination at each of the ports resulted in spurious critical frequencies which made the proper separation of the sidebands extremely difficult. A second area of investigation, which developed as a means of overcoming the filtering problem described above, was the study of hybriding techniques to separate the sidebands by phase cancellation.
- Electrical and Electronic Equipment