FREQUENCY METERING DEVICE Russian patent published in 1997 - IPC

FIELD: radio measurement technology; frequency metering and demodulating frequency-modulated waves. SUBSTANCE: device has differentiating and integrating RC circuits 1 and 2, first and second amplitude detectors 3 and 4, functional divider 5, adder 6, oscillator 7 with resonator built around iron-yttrium garnet, phase detector 8, third amplitude detector 9, synchronous detector 10, amplifier 11, and ac voltage generator 12. Output signal of oscillator 7 with extreme regulation system applied to it and tending to approach oscillator frequency to frequency being measured to utmost extent is used as output signal of device; voltage picked off functional divider 5 is also applied to oscillator input. EFFECT: improved measurement accuracy. 3 dwg