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US 8,044,717 B2Granted
Amplifier circuit and method therefor
AssigneeSemiconductor Components Industries, LLC
InventorMarc Henri Ryat
Life of this patent
Estimating the term…
Abstract
In one embodiment, an amplifier circuit is formed to minimize pop and click noise on the outputs of the amplifier circuit. The amplifier circuit is configured to place an output stage of the amplifier circuit in a high impedance state to minimize the pop and click noise. In another embodiment, the amplifier circuit is configured to couple the inputs of two amplifiers together to minimize the pop and click noise.
Claims6
A method of forming an amplifier circuit comprising:
- forming a first amplifier having a first input, a second input, and having an output coupled to a first output of the amplifier circuit;
- forming a second amplifier having a first input, a second input, and having an output coupled to a second output of the amplifier circuit;
- configuring the amplifier circuit to have an input coupled to a capacitor external to the amplifier circuit;
- and
- configuring the amplifier circuit to form a first time interval and selectively couple the amplifier circuit to charge the capacitor during the first time interval, and to subsequently form a second time interval and selectively decouple the amplifier circuit from charging the capacitor and to also couple the amplifier circuit to amplify an input signal, including configuring the amplifier circuit to selectively couple the first input of the first amplifier to the first input of the second amplifier and to subsequently decouple the first input of the first amplifier from the first input of the second amplifier.
2 more elements
Dependencies are inferred from the claim text.