RADIO MICROPHONE Russian patent published in 1994 - IPC

FIELD: electroacoustics. SUBSTANCE: radio microphone has dielectric case 1, radio transmitter 2, upper arm 3 of oscillator, microphone inset 4, noise suppressing screen 5, capacitor 6 of output stage of radio transmitter, lower arm 7 of oscillator, power supply cell 8, high-frequency choke 9. Transmitter includes capacitor, first resistor, first and second diodes, inductance coil of self-excited oscillator, first and second field-effect transistors, additional capacitor, first and second chokes, light-emitting diode, third capacitor, by-pass capacitor. EFFECT: increased frequency stability and efficiency of radio microphone, expanded dynamic range, simplified design, reduced losses of power. 2 dwg