Patent ID: 9515605
Filing Date: 2016-12-06
CPC Classification: H03B

Claim Text:
1. An oscillator, comprising: a resonator input configured to receive, from an electro-mechanical resonator, a resonator signal; an oscillator core comprising a first and a second cross-coupled complementary inverter forming a first loop and a second loop with the resonator input, respectively; wherein the inverters are programmable to contribute to the resonator signal a first gain or a second gain to generate balanced oscillations in the oscillator; wherein the first gain is less than an upper threshold gain required to generate parasitic-mode oscillations when starting balanced oscillations, and the second gain is equal to or greater than a lower threshold gain required to generate resonator-mode oscillations; and wherein each inverter comprises a first complementary transistor pair and a second complementary transistor pair, the first complementary transistor pair connected to the oscillator core to contribute gain to the resonator signal, the second complementary transistor pair in series with the first complementary transistor pair to regulate the amount of power received to control the gain contributed by the first complementary transistor pair according to a control voltage signal.