Patent ID: 9356557
Filing Date: 2016-05-31
CPC Classification: H03B,H03J,H03L

Claim Text:
1. An apparatus, comprising: an LC circuit including an adjustable capacitive circuit and an inductive circuit connected in a circuit loop with a first end of the adjustable capacitive circuit coupled to a first node and a second end of the adjustable capacitive circuit coupled to a second node; wherein the inductive circuit includes one or more inductive elements and a switching circuit configured and arranged to in a first mode, provide a direct-current (DC) charge voltage across the LC circuit and prevent oscillation of energy between the capacitive circuit and the inductive circuit by opening a switch in the circuit loop of the LC circuit, and in a second mode, enable the oscillation of energy between the capacitive circuit and the inductive circuit by closing the switch in the circuit loop; and a plurality of capacitive branch circuits, each having a respective set of capacitors and configured and arranged to contribute a first amount of capacitance between the first and second nodes when enabled and a second lesser amount of capacitance when disabled; and an initialization circuit configured and arranged to, for each of the plurality of capacitive branch circuits, couple the capacitor branch circuit to a respective reference voltage in response to the capacitive branch circuit being disabled and the switching circuit operating in the first mode.