The invention discloses a low
power consumption and rapid oscillation starting
crystal oscillator module with a transposable start oscillation condition, which consists of an inverting
amplifier, an inverting reshaper chain, an
automatic gain control loop (AGC), a feedback
resistor, a power limitation
resistor, and an external passive
crystal oscillator and an external load
capacitor. The inverting
amplifier is provided with a transposable feedback
resistor R1, and the transposable start oscillation condition of the
crystal oscillator is realized; and the
automatic gain control loop (AGC) is inserted between an input end and a bias end of the inverting
amplifier, and the contradiction between the oscillation starting time and
power consumption is solved. The invention also provides a highresistor realizing IC (
integrated circuit) by adopting a
transconductance amplifier of micro
current source, and a transposable feedback resistor R1 for the oscillator amplifier
branch circuit and a high resistor in a pi-shaped filter. The resistance value of the
high resistance can be controlled by
programming, the start oscillation condition of the oscillator can be adjusted through adjusting the feedback resistance R1, and reliable and
quick start oscillation of the oscillator can be realized; and lower
phase noise can be realized through adjusting the high resistor in the pi-shaped filter. The
crystal oscillator circuit has the characteristics of low
power consumption and rapid start oscillation, and can be used for the digital
integrated circuit, such as a base band of various of
satellite navigation allocation receptors, real time clocks (RTC).