Patent ID: 9413341
Filing Date: 2016-08-09
CPC Classification: H03B,H03K

Claim Text:
1. An oscillator for generating balanced oscillations, the oscillator comprising: an electro-mechanical resonator for creating oscillations in the oscillator; an oscillator core connected to the electro-mechanical resonator for starting and sustaining balanced oscillations in the oscillator, the oscillator core comprising first and second cross-coupled complementary inverters forming a loop, each inverter comprising an output; first and second capacitors connected in series in the loop to the outputs of the first and second cross-coupled complementary inverters, respectively, and configured to inhibit the cross-coupled complementary inverters from latching to a static direct current state when starting oscillations; and a resistor network connecting the output of the first inverter to the output of the second inverter for creating a high pass filter with the capacitors to inhibit relaxation-mode oscillations, the resistor network comprising a switchable connection to the outputs of the first and second inverters; a controller connected to the resistor network and configured to enable the switchable connection when starting the oscillations to create the high pass filter with the capacitors to inhibit relaxation-mode oscillations, and to disable the switchable connection in response to balanced oscillations in the oscillator at steady state to reduce phase noise and increase the amplitude of the balanced oscillations.