Title:
AUDIO AMPLIFIER CIRCUIT AND VEHICLE-MOUNTED ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/190209
Kind Code:
A1
Abstract:
An audio amplifier circuit 200 receives power supply voltage VCC at a power supply terminal VCC. A voltage source 250 generates internal power supply voltage VREGA obtained by multiplying the power supply voltage VCC by a first gain, and bias voltage VFIL obtained by multiplying the power supply voltage VCC by a second gain. An input gain circuit 210 amplifies an analog audio signal with the bias voltage VFIL as a reference. The input gain circuit 210 has an input stage 214 and a gain stage 216. A phase compensation capacitor C21 is connected to the gain stage 216. A withstand voltage protection circuit 212 clamps output voltage VM of the gain stage 216 at a predetermined clamp voltage VCL.
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Inventors:
SAKAI MITSUTERU (JP)
Application Number:
PCT/JP2023/011939
Publication Date:
October 05, 2023
Filing Date:
March 24, 2023
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H03F1/52; H03F3/187; H03F3/213; H03F3/217
Foreign References:
| JP2009049671A | 2009-03-05 | |||
| JPH1013166A | 1998-01-16 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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