DC-coupled SERDES receiver
AssigneeSamsung Electronics Co., Ltd.
InventorsXiong Liu, Hiep Pham
Life of this patent
Estimating the term…
Abstract
A receiver includes a first T-coil circuit at an input of the receiver and configured to receive an input signal, a termination impedance coupled to the first T-coil circuit and configured to match an impedance of a transmission line coupled to the first T-coil circuit, and an amplifier including a first input and a second input and configured to amplify a differential signal at the first and second inputs, a calibration switch coupled to the amplifier and configured to selectively electrically connect or disconnect the first and second inputs of the amplifier, and a first receive switch configured to selectively electrically connect or disconnect a center node of the first T-coil circuit and the amplifier.
Claims20
A receiver comprising:
- a first T-coil circuit at an input of the receiver and configured to receive an input signal;
- a termination impedance coupled to the first T-coil circuit and configured to match an impedance of a transmission line coupled to the first T-coil circuit;
- and
- an amplifier comprising a first input and a second input and configured to amplify a differential signal at the first and second inputs;
- a calibration switch coupled to the amplifier and configured to selectively electrically connect or disconnect the first and second inputs of the amplifier;
- and
- a first receive switch configured to selectively electrically connect or disconnect a center node of the first T-coil circuit and the amplifier.
A receiver comprising:
- a pair of T-coil circuits at an input of the receiver and configured to receive an input signal;
- a termination impedance coupled to the pair of T-coil circuits and configured to match an impedance of a transmission line coupled to the pair of T-coil circuits;
- and
- an amplifier comprising a first input and a second input and configured to amplify a differential signal at the first and second inputs;
- a calibration switch coupled to the amplifier and configured to selectively electrically connect or disconnect the first and second inputs of the amplifier;
- and
- a pair of receive switches configured to selectively electrically connect or disconnect center nodes of the pair of T-coil circuits and the amplifier.
A method of operating a receiver comprising:
- identifying a mode of the receiver as a calibration mode or a receive mode;
- and
- in response to identifying the mode as the calibration mode:
- activating a calibration switch of the receiver to electrically couple inputs of an amplifier of the receiver together to enable measurement of an offset voltage of an amplifier of the receiver;
- and
- deactivating a receive switch of the receiver to electrically isolate the amplifier from a T-coil circuit at an input of the receiver, the T-coil circuit being configured to receive an input signal;
- and
- in response to identifying the mode as the receive mode:
- deactivating the calibration switch to electrically decouple inputs of the amplifier;
- and
- activating the receive switch to electrically connect the amplifier to center nodes of the T-coil circuit and to enable the amplifier to amplify a signal at an output of the T-coil circuit.
Dependencies are inferred from the claim text.