Oscillation Condition of Quartz-Oscillating Circuit in High Frequency (1)

Abstract

A novel oscillation condition of quartz oscillating circuit with 622 MHz AT-Cut HFF-Xtal (=High Frequency Fundamental-crystal) oscillator is established. A circuit analysis is performed by combining a shunt capacitance (C₀) with a negative resistance (-R_ci) and a combination capacitance (C_t). A load resistance (R_L) is obtained by combining C₀ with -R_ci. A maximum load resistance (R_Lmax) is relative to the value of combination capacitance (C_t).