A crystal oscillator chip with low power and high stability is presented.On the basis of analyzing the disadvantages of the conventional Pierce crystal oscillator

a novel crystal oscillator structure has been proposed.The chip can work under two modes: normal operating mode and power-dissipation mode.Based on 0.35 μm CMOS process

the test results show that total consumption of the chip is less than 5 mA with power supply voltage of 5 V

oscillation frequency of 30 MHz

load capacitance of 15 pF

and the oscillator circuit is only 0.6 mA

output square wave signal with duty cycle of 50 ± 0.8%

frequency stability 0.5×10.By introducing the power-dissipation mode

current consumption of the oscillation circuit is dropped to 3 μA.Compared with the conventional structure

the power-dissipation has been reduced 60%

frequency stability raised ten times.