Nxp Usa, Inc.

Ihp Gmbh-innovations for High Performance Microelectronics/leibniz-institut Fur Innovative Mikroelektronik

Alexey Balashov

Andrey Evgenevich Malkov

Dietmar Kissinger

Ahmed Awny

The invention relates to an amplification circuit (), comprising: a VGA (), an AGC loop () for automatically controlling the gain of the VGA (), a switching circuit () for switching between an AGC mode, in which the gain of the VGA () is automatically controlled by an output signal of the AGC loop () and a manual gain control, MGC, mode, in which the gain of the VGA () can be manually controlled by an input signal, and a read/write circuit () with a contact () for connection to a peripheral system, wherein the read/write circuit () is configured, in the MGC mode, to provide the input signal from the contact () via a write-mode path () to the VGA (), and, in the AGC mode, to provide the output signal of the AGC loop () via a read-mode path () on the contact ().

Amplification circuit with read/write circuit

A Low-Voltage Differential Signaling (differential signaling) driver circuit () comprising enable circuitry for enabling and disabling the differential signaling driver circuit () in accordance with an control signal is described. The differential signaling driver circuit () comprises: a differential output () connected or connectable to a differential signaling receiver circuit via a differential transmission line; current control circuitry () for driving a signal current through the differential output () in accordance with a driver signal; feedback circuitry () for driving the current control circuitry () to counteract a difference between a common mode voltage of the differential output () and a reference voltage from a reference voltage provider; and the enable circuitry (). The feedback circuitry () comprises a common mode node () for providing the common mode voltage (Vcm), a reference input () connected or connectable to the reference voltage provider, and a feedback input (). The enable circuitry () is arranged to connect the feedback input () to the common mode node () when the differential signaling driver circuit () is in an enabled state and to the reference voltage provider when the differential signaling driver circuit () is in a disabled state. A method of enabling () and disabling () a Low-Voltage Differential Signaling (differential signaling) driver circuit () is also proposed.

Low-voltage differential signaling (differential signaling) driver circuit and method of enabling and disabling a differential signaling driver circuit

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Frankfurt-am-Main, Germany

Alexey Balashov