Patent ID: 9575116
Date: 2017-02-21
CPC Classifications: B81B,B81C,G01R,H01L,H04R

Claim:
1. An integrated circuit for biasing a MEMS capacitive transducer having a MEMS capacitor, the integrated circuit comprising: a charge pump comprising an input for receiving an input voltage and an output for outputting an output voltage for biasing a first plate of the MEMS capacitor, wherein the output of said charge pump is coupled to a first circuit node; a first capacitor having a first plate and a second plate, wherein said first plate of the first capacitor is connected to said first circuit node; and switching circuitry coupled to the second plate of the first capacitor for selectively coupling a test signal to the first node and to the first plate of the MEMS capacitor via the first capacitor during a test mode of operation.