Amplifier configurable into multiple modes
AssigneeAnalog Devices International Unlimited Company
InventorsLi Wang, Hanqing Wang, Tony Yincai Liu, Shurong Gu
Life of this patent
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Abstract
This disclosure describes techniques for selecting one of a plurality of modes in which to operate an amplifier. The techniques include configuring input routing circuitry, coupled to first and second inputs of the amplifier, based on the selected one of the plurality of modes; selectively applying a resistance to an output of the amplifier, using feedback routing circuitry, based on the selected one of the plurality of modes; and selectively applying one of a plurality of reference voltages, using reference voltage routing circuitry, coupled to the first and the second inputs of the amplifier, based on the selected one of the plurality of modes.
Claims20
A system for switching amplifier modes, the system comprising:
- a first amplifier configured to operate in one of a plurality of modes;
- input routing circuitry, coupled to first and second inputs of the first amplifier, configured to route an input signal to the first input of the first amplifier to configure the first amplifier to operate in a first mode of the plurality of modes and route the input signal to the second input of the first amplifier to configure the first amplifier to operate in a second mode of the plurality of modes;
- feedback routing circuitry, coupled to an output of the first amplifier, configured to route the output of the first amplifier through a first resistor to configure the first amplifier to operate in the first mode and route the output of the first amplifier through a second resistor to configure the first amplifier to operate in the second mode;
- and
- reference voltage routing circuitry, coupled to the first and the second inputs of the first amplifier, configured to route one of a plurality of reference voltages to the first or second inputs of the first amplifier based on an operation mode of the first amplifier.
A method for switching amplifier modes, the method comprising:
- selecting one of a plurality of modes in which to operate a first amplifier;
- configuring input routing circuitry, coupled to first and second inputs of the first amplifier, based on the selected one of the plurality of modes, such that:
- an input signal is routed by the input routing circuitry to the first input of the first amplifier to configure the first amplifier to operate in a first mode of the plurality of modes;
- and
- the input signal is routed to the second input of the first amplifier to configure the first amplifier to operate in a second mode of the plurality of modes;
- selectively applying a resistance to an output of the first amplifier, using feedback routing circuitry, based on the selected one of the plurality of modes, such that:
- an output of the first amplifier is routed by the feedback routing circuitry through a first resistor to configure the first amplifier to operate in the first mode;
- and
- the output of the first amplifier is routed by the feedback routing circuitry through a second resistor to configure the first amplifier to operate in the second mode;
- and
- selectively applying one of a plurality of reference voltages, using reference voltage routing circuitry, coupled to the first and the second inputs of the first amplifier, based on the selected one of the plurality of modes.
A system for switching amplifier modes, the system comprising:
- an amplifier configured to operate in one of a plurality of modes;
- input routing circuitry, coupled to a first input of the amplifier, configured to route a first input signal, received via a first physical connection, to the first input of the amplifier to configure the amplifier to operate in a first mode of the plurality of modes and route a second input signal, received via a second physical connection, to the first input of the amplifier to configure the amplifier to operate in a second mode of the plurality of modes;
- and
- feedback routing circuitry, coupled to an output of the amplifier, configured to route the output of the amplifier through a first resistor to the first input signal to configure the first amplifier to operate in the first mode and route the output of the amplifier through a second resistor to the second input signal to configure the amplifier to operate in the second mode, wherein the first mode comprises a programmable gain amplifier direct current mode, the second mode comprises a current to voltage converter mode, and a third mode comprises a programmable gain amplifier alternating current mode.
Dependencies are inferred from the claim text.