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US 2019/0131947 A1Published application
Audio circuit
AssigneeRohm Co., Ltd.
InventorMitsuteru SAKAI
Life of this patent
Estimating the term…
Abstract
A D/A converter coverts a digital audio signal into an analog audio signal. An analog volume circuit receives an output of the D/A converter. A controller controls the analog volume circuit. The controller shortens transition time at each step in the analog volume circuit further as gain is lower.
Claims9
An audio circuit comprising:
- a digital/analog (D/A) converter structured to covert a digital audio signal into an analog audio signal;
- an analog volume circuit coupled to receive an output of the D/A converter;
- and
- a controller structured to control gain of the analog volume circuit,
- wherein the controller is structured to shorten transition time at each step in the analog volume circuit further as the gain is lower.
2 more elements
An audio circuit comprising:
- an isolation amplifier coupled to receive an analog audio signal;
- an analog volume circuit coupled to receive an output signal of the isolation amplifier;
- and
- a controller structured to control gain of the analog volume circuit,
- wherein the controller is structured to shorten transition time at each step in the analog volume circuit further as the gain is lower.
2 more elements
Dependencies are inferred from the claim text.