| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: method of direct frequency conversion for GLONASS satellite navigation receivers includes splitting of heterodyne signal in two paraphase signals with a frequency equal to a half of frequency of an input signal which is supplied to gates of the interdigital field transistors of the mixer, multiplication on the interdigital field transistors of the mixer of input signal and heterodyne signals, conversion of the received signals by the low pass filter, formation of paraphase voltages of heterodyne by means of the standard paraphase amplifier of the control unit, implementation of bilateral limitation of input signal upstream the interdigital field transistors of the mixer and increase up to 12 MHz of cutoff frequency of the low pass filter.EFFECT: improvement of noise stability of the receiver and simplification of its design.2 cl, 2 dwg |
