Patent ID: 9252708
Filing Date: 2016-02-02
CPC Classification: H03B

Claim Text:
1. A resonant element driver circuit comprising: a pair of transistors configured to drive a resonant element, the pair of transistors comprising a first transistor and a second transistor; first biasing circuitry configured to bias the first transistor; second biasing circuitry configured to receive a reference signal independent of a voltage source and to use the reference signal in order to bias the second transistor, wherein the second biasing circuitry comprises a third transistor coupled to a gate terminal of the second transistor, and wherein the third transistor is configured to receive the reference signal or a second signal that is generated based on the reference signal; and mirror circuitry in communication with the second biasing circuitry, the mirror circuitry configured to track current flowing through the first transistor and the second transistor.