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- [1] NONLINEARITIES OF A TRANSISTORIZED FREQUENCY-CONVERTER WITH VARIABLE NEGATIVE FEEDBACK IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII RADIOELEKTRONIKA, 1988, 31 (07): : 82 - 85
- [5] BROAD-BAND FEEDBACK AMPLIFIERS PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1953, 41 (03): : 408 - 408
- [7] BROAD-BAND MICROWAVE FREQUENCY DOUBLERS RADIO AND ELECTRONIC ENGINEER, 1978, 48 (1-2): : 29 - 32