Amplifier with high power supply noise rejection
AssigneeQUALCOMM Incorporated
InventorVijayakumar Dhanasekaran
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Abstract
An amplifier with high power supply rejection is disclosed. In an exemplary implementation, an amplifier includes a first stage configured to receive a signal to be amplified, a second stage comprising an input transistor coupled to the first stage, and further comprising at least one additional transistor, and a voltage regulator configured to received a first supply voltage and generate a regulated supply voltage, the first supply voltage coupled to the at least one additional transistor, the regulated supply voltage coupled to the first stage and the input transistor of the second stage to improve power supply noise rejection of the apparatus.
Claims15
An apparatus comprising:
- a first stage configured to receive a signal to be amplified and to generate an amplified version of the signal at an output terminal;
- a second stage comprising an input transistor connected to the first stage, and further comprising at least one additional transistor;
- and
- a voltage regulator configured to receive a negative supply voltage and generate a negative regulated supply voltage, the negative supply voltage connected to the at least one additional transistor, the negative regulated supply voltage connected to the first stage and the input transistor of the second stage, the voltage regulator configured to reduce coupling of the negative supply to the output terminal to improve power supply noise rejection of the apparatus.
An apparatus comprising:
- means for providing a first stage configured to receive a signal to be amplified and to generate an amplified version of the signal at an output terminal;
- means for providing a second stage connected to the first stage;
- and
- means for generating a negative regulated supply voltage from a negative supply voltage, the negative supply voltage connected to the second stage and the negative regulated supply voltage connected to the first stage and a means for switching of the second stage, the means for generating configured to reduce coupling of the negative supply to the output terminal to improve power supply noise rejection of the apparatus.
Dependencies are inferred from the claim text.