FREQUENCY-MODULATED RADIOSPECTROMETER Russian patent published in 1996 - IPC

FIELD: radio measurement technology. SUBSTANCE: frequency-modulated radiospectrometer has antenna 1, high-frequency amplifier 2, mixer 3, intermediate-frequency amplifier 4, first, second, third local oscillators 5, 20, 21, first, second single-band mixers 6, 7, first, second band filters 8, 9, first second quadrature detectors 10, 11 subtraction unit 12, adding unit 13, first, second synchronous detectors 14, 15, modulating-frequency oscillator 16, recorder 17, DC amplifier 18, local oscillators control unit 19. Modulating-frequency oscillator 16 has sawtooth-voltage master oscillator whose reference output functions as second output of modulated- frequency oscillator 16 and is connected to second inputs of synchronous detectors 14, 15, master oscillator voltage amplifier, base-voltage clipper, peak-voltage clipper, voltage amplifier whose output functions as first output of modulating-frequency oscillator 16. Local oscillators control unit 19 has three adders, and subtracter whose combined first inputs function as input of local oscillators control unit 19, reference-voltage source, peak and base frequency deviation voltage amplifiers whose outputs function, respectively, as first and second outputs of local oscillators control unit 19 and are connected to reference outputs of clippers, first, second control units whose outputs function, respectively, as third and fourth outputs of local oscillators control unit 19. EFFECT: improved design. 3 dwg