Invention Grant
- Patent Title: Amplifier circuit and methods of operation thereof
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Application No.: US15085360Application Date: 2016-03-30
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Publication No.: US09685855B2Publication Date: 2017-06-20
- Inventor: John P. Lesso , John L. Pennock , Peter J. Frith
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Blank Rome LLP
- Priority: GB0625955.0 20061222
- Main IPC: H03G3/10
- IPC: H03G3/10 ; H02M3/07 ; H03F1/02 ; H03F3/187 ; H03F3/68 ; H03F3/185 ; H03G1/00

Abstract:
A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path for generating the output signal, the output stage having a gain that is substantially independent of its supply voltage, and a variable voltage power supply comprising a charge pump for providing positive and negative output voltages, the charge pump comprising a network of switches that is operable in a number of different states and a controller for operating the switches in a sequence of the states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage.
Public/Granted literature
- US20160211816A1 AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF Public/Granted day:2016-07-21
Information query