Patent ID: 11956595
Assignee: ANPEC ELECTRONICS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The micro electro-mechanical film speaker device according to claim 1, wherein the signal amplifier circuit includes:
a first input resistor, wherein a first terminal of the first input resistor is connected to the external input circuit, and the signal input terminal of the signal amplifier circuit includes the first terminal of the first input resistor;
a second input resistor, wherein a first terminal of the second input resistor is connected to the external input circuit, and the signal input terminal of the signal amplifier circuit includes the first terminal of the second input resistor;
an operational amplifier, wherein a first input terminal of the operational amplifier is connected to a second terminal of the first input resistor, a second input terminal of the operational amplifier is connected to a second terminal of the second input resistor, the first output terminal of the operational amplifier is connected to the first terminal of the first high-pass filter, and the second output terminal of the operational amplifier is connected to the negative terminal of the micro electro-mechanical film speaker;
a first feedback resistor, wherein a first terminal of the first feedback resistor is connected to the first input terminal of the operational amplifier, and a second terminal of the first feedback resistor is connected to the first terminal of the second high-pass filter through the feedback terminal; and
a second feedback resistor, wherein a first terminal of the second feedback resistor is connected to the second input terminal of the operational amplifier, and a second terminal of the second feedback resistor is connected to the second output terminal of the operational amplifier.