이중 변환 TV 튜너용 MMIC 전압제어발진기의 설계 제작

Abstract

In this paper an MMIC VCO which can be used in a double conversion TV tuner is designed, fabricated and measured. The VCO is designed using the small signal design method and fabricated using ETRI GaAs MMIC Foundry. The 3x200 ㎛ gate width MESFET with 1㎛ gate length is used for an active device and MIN capacitors, spiral inductors, thin film resistors are used as passive elements. The VCO has output power of 10.95 dBm at 1955 MHz with 5 V bias voltage and 4 V tuning voltage. The oscillation frequency change from 1947 MHz to 1964 MHz is obtained by an external varactor diode connected to the gate with a tuning voltage from 0 V to 6 V.