Patent ID: 8963400
Filing Date: 2015-02-24
Classification: H01L,H02J

Abstract:
1. A piezo driver comprising: a first passive energy storage component and a second passive energy storage component, the first passive energy storage component and the second passive energy storage component configured to store electric charge; a voltage converter configured to electrically connect between a piezo component and the first passive energy storage component and the second passive energy storage component, wherein the voltage converter is configured to furnish electric charge from the first passive energy storage component to the piezo component during a first state of operation and to furnish electric charge from the piezo component to the first passive energy storage component during a second state of operation, the voltage converter configured to furnish electric charge from the second passive energy storage component to the piezo component during a third state of operation and to furnish electric charge from the piezo component to the second passive energy storage component during a fourth state of operation; and a dual output charge pump electrically connected to the first passive energy storage component and the second passive energy storage component, the dual output charge pump configured to generate a first output voltage and a second output voltage greater in absolute value than an input voltage furnished to the dual output charge pump, the first passive energy storage component configured to store an electric charge such that a voltage across the first passive energy storage component approximately equals the first output voltage and the second passive energy storage component configured to store an electric charge such that a voltage across the second passive energy storage component approximately equals the second output voltage.