Amplifiers with shunt switches
AssigneeQUALCOMM Incorporated
InventorsHimanshu Khatri, Ojas M Choksi, Wei Zhuo
Life of this patent
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Abstract
Amplifiers with shunt switches to mitigate interference are disclosed. In an exemplary design, an apparatus includes an amplifier and a shunt switch. The amplifier has an input operatively coupled to an input/output (I/O) pad of an integrated circuit (IC) chip. The shunt switch grounds the amplifier when the shunt switch is closed. The shunt switch is isolated from the I/O pad and the amplifier input. The amplifier may be a low noise amplifier (LNA) or some other type of amplifier. In an exemplary design, the shunt switch is isolated from the I/O pad by a series switch. The series switch and the shunt switch may be closed when the amplifier is disabled and may be opened when the amplifier is enabled.
Claims18
An apparatus comprising:
- an amplifier for amplifying an radio frequency (RF) input signal having an amplifier input operatively coupled to an input/output (I/O) pad of an integrated circuit (IC) chip;
- and
- a shunt switch configured to ground the amplifier input configured to receive the RF input signal when the shunt switch is closed, the shunt switch being isolated from the I/O pad and the amplifier input.
An apparatus comprising:
- an amplifier for amplifying an radio frequency (RF) input signal having an amplifier input coupled to an input/output (I/O) pad of an integrated circuit (IC) chip;
- a series switch coupled between the I/O pad and a node;
- and
- a shunt switch configured to ground the amplifier input configured to receive the RF input signal and coupled between the node and circuit ground, the shunt switch being isolated from the I/O pad and the amplifier input by the series switch.
A method comprising:
- enabling or disabling an amplifier for amplifying an radio frequency (RF) input signal having an amplifier input operatively coupled to an input/output (I/O) pad of an integrated circuit (IC) chip;
- and
- closing a shunt switch configured to ground the amplifier input configured to receive the RF input signal when the shunt switch is closed, the shunt switch being isolated from the I/O pad and the amplifier input.
An apparatus comprising:
- means for amplifying an radio frequency (RF) input signal having an input and configured to receive the RF input signal via an input/output (I/O) pad of an integrated circuit (IC) chip;
- and
- means for switching configured to ground the input configured to receive the RF input signal of the means for amplifying when the means for switching is closed, the means for switching being isolated from the I/O pad and the input of the means for amplifying.
Dependencies are inferred from the claim text.