High-impedance sensing on iii-v semiconductor device in an optical transceiver

A method for configuring a III-V semiconductor device in an optical transceiver, the method comprising:

• configuring processing circuitry to receive or transmit an electrical signal corresponding to an optical signal;
• communicatively coupling feedback control circuitry to the processing circuitry by a circuit loop including forming a first transistor, in the circuit loop, from a III-V semiconductor material to function as a first sensing resistor having a first resistance value that limits loading applied to the processing circuitry by the feedback control circuitry;
• and
• configuring the feedback control circuitry to:
• sense a characteristic of the electrical signal, and
• based on the sensed characteristic, feed back a control signal over the circuit loop to the processing circuitry.

A signal processing circuit formed using a III-V material, the signal processing circuit comprising:

• feedback control circuitry configured to:
• sense a characteristic of a received electrical signal, and
• based on the sensed characteristic, transmit over a circuit loop a feedback signal;
• wherein:
• the circuit loop comprises a first transistor formed using a III-V semiconductor material and configured to function as a first sensing resistor having a first resistance value that limits loading applied to an output of the feedback control circuitry.