Back to results
US 2006/0067711 A1Published application
Receiver with dynamically adjustable decision threshold voltage based on input power
AssigneeEmcore Corporation
InventorCraig Schulz
Life of this patent
Estimating the term…
Abstract
According to embodiments of the present invention, an optical transponder and/or optical transceiver includes a decision circuit, which scales a decision threshold voltage based on power in a received optical signal. In one embodiment, the decision set point may be established based on an expected amplitude or power of an incoming optical signal and the transponder and/or transceiver uses the actual power of the incoming optical signal to adjust the decision threshold voltage.
Claims26
A method, comprising:
- receiving a value representing a threshold voltage set point for a circuit, the circuit to determine whether a data bit on a first optical signal is a logical one or a logical zero, the threshold voltage set point being based on a first average power of the first optical signal;
- receiving second optical signal having a second average power different from the first average power;
- and
- adjusting the threshold voltage set point based on the second average power.
1 more element
An apparatus, comprising:
- circuitry to generate a voltage proportional to an average power in an optical signal;
- a digital-to-analog converter to multiply the voltage times a set point to obtain a scaled set point, the set point to determine whether a data bit on the optical signal is a logical one or a logical zero;
- and
- an amplifier to decide whether a data bit on the optical signal is a logical one or a logical zero using the scaled set point.
1 more element
An apparatus, comprising:
- an optical receiver to convert an optical signal to a voltage signal proportional to a power level of the optical signal, the voltage signal having at least one data bit having a logical one or a logical zero;
- and
- a decision circuit to adjust a decision set point and to decide whether the data bit is a logical one or a logical zero using the adjusted decision set point.
A system, comprising:
- an optical receiver to convert an optical signal to a voltage signal proportional to an average power of the optical signal, the voltage signal having at least one data bit having a logical one or a logical zero;
- a decision circuit to automatically scale a decision threshold voltage value using the voltage signal and to decide whether the at least one data bit is a logical one or a logical zero using the adjusted decision threshold voltage value;
- and
- a 300-pin connector coupled to the decision circuit to receive the decision threshold voltage value.
1 more element
An article of manufacture, comprising:
- a machine-accessible medium including data that, when accessed by a machine, cause the machine to perform operations comprising:
- receiving a set point to determine whether a data bit on an optical signal is a logical one or a logical zero;
- receiving the optical signal having an average power;
- and
- adjusting the set point based on the average power in the optical signal.
2 more elements
A method, comprising:
- receiving a threshold voltage value to determine whether a data bit on an optical signal is a logical one or a logical zero;
- receiving an optical signal;
- converting the optical signal to a proportional voltage;
- scaling the threshold voltage value in proportion to proportional voltage;
- converting optical signal to proportional current;
- summing the proportional current with the scaled threshold voltage value;
- and
- determining whether a data bit on the received optical signal is a logical one or a logical zero using the proportional current summed with the scaled threshold voltage value.
5 more elements
Dependencies are inferred from the claim text.