Receiver device, reception system, process and light-signal communication method
AssigneesSTMicroelectronics (Grenoble 2) SAS, STMicroelectronics (Alps) SAS
InventorsNicolas Moeneclaey, Vratislav Michal, Jean-Luc Patry
Life of this patent
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Abstract
The present disclosure is directed to a light-signal communication receiver device including a photo-receiving diode configured to generate a current signal on a first node from a received light signal, a preamplifier configured to convert the current signal on the first node into a voltage signal on a second node, and a differential amplifier including a first input connected to the first node and a second input connected to a third node coupled to the second node via an adjustment circuit. The adjustment circuit is configured to offset the level of the voltage signal of the second node, on the third node, in a controlled manner by a control signal.
Claims20
A light-signal communication receiver device, comprising:
- a photo-receiving diode configured to generate a current signal on a first node from a received light signal;
- a preamplifier configured to convert the current signal on the first node into a voltage signal on a second node;
- and
- a differential amplifier including a first input connected to the first node, a second input connected to a third node, and an adjustment circuit, the third node being coupled to the second node through the adjustment circuit, the adjustment circuit configured to offset a level of the voltage signal on the third node in a controlled manner by a control signal.
A process for receiving a light-signal communication, the process comprising:
- generating, by a photo-receiving diode, a current signal on a first node from a light signal received by the photo-receiving diode;
- converting, by a preamplifier, the current signal on the first node into a voltage signal on a second node;
- offsetting, by a differential amplifier and on a third node, a level of the voltage signal in a controlled manner by a control signal;
- and
- performing, by the differential amplifier, differential amplification between a voltage on the first node and a voltage on the third node.
A device, comprising:
- a photo-receiving diode configured to receive a light signal and generate a signal based on the light signal;
- a preamplifier coupled the photo-receiving diode, the preamplifier configured to convert the signal to a voltage signal;
- and
- a differential amplifier coupled to the photo-receiving diode and the preamplifier, the differential amplifier including:
- a current generator circuit configured to receive a control signal, and generate an adjustment current based on the control signal;
- and
- an adjustment circuit configured to offset the voltage signal based on the adjustment current.
A method, comprising:
- receiving, by a photo-receiving diode, a light signal;
- generating, by the photo-receiving diode, a signal based on the light signal;
- converting, by a preamplifier coupled the photo-receiving diode, the signal to a voltage signal;
- receiving, by a current generator circuit of a differential amplifier coupled to the photo-receiving diode and the preamplifier, a control signal;
- generating, by the current generator circuit, an adjustment current based on the control signal;
- and
- offsetting, by an adjustment circuit of the differential amplifier, the voltage signal based on the adjustment current.
Dependencies are inferred from the claim text.