US 12,228,607 B2
Temperature compensation of optically isolated probe
Matthew Weinstein, Glen Rock, NJ (US); Francois Lamarche, New Milford, NJ (US); and Lawrence Jacobs, Rockville, MD (US)
Assigned to TELEDYNE LECROY, INC., Thousand Oaks, CA (US)
Filed by Teledyne LeCroy, Inc., Thousand Oaks, CA (US)
Filed on Apr. 10, 2023, as Appl. No. 18/298,249.
Prior Publication US 2024/0337685 A1, Oct. 10, 2024
Int. Cl. G01R 31/28 (2006.01); G01R 31/302 (2006.01)
CPC G01R 31/2874 (2013.01) [G01R 31/3025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A receiver comprising:
a magnitude correction circuit to receive an electrical signal defined by a phase, wherein the electrical signal is a combined electrical signal comprising a first signal and a second signal, the magnitude correction circuit comprising:
a detector to generate a control signal proportional to received power of the second signal; and
an error amplifier coupled to the detector to compare a reference voltage against an output of the detector to generate a signal proportional to the difference between the reference voltage and the output of the detector to determine an amplification or attenuation of the second signal based on a drift of the electrical signal;
a variable gain amplifier coupled to the magnitude correction circuit, the variable gain amplifier to generate a compensated electrical signal based on the amplification or attenuation of the second signal determined by the magnitude correction circuit; and
a de-modulating mixer coupled to the magnitude correction circuit, the de-modulating mixer to mix a phase compensated signal and the compensated electrical signal.