Source-measure unit based on digital control loop

Details Source-measure unit based on digital control loop Source-measure unit based on digital control loop

2011-03-08

2011-03-08

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Converter is part of control loop

C702S060000

Reexamination Certificate

active

07903008

ABSTRACT:
A source-measure unit (SMU) may be implemented with a control loop configured in the digital domain. The output voltage and output current may be measured with dedicated ADCs (analog-to-digital converters). The readings obtained by the ADCs may be compared to a setpoint, which may be set in an FPGA (field programmable gate array) or DSP (digital signal processing) chip. The FPGA or DSP chip may then be used to produce an output to drive a DAC (digital-to-analog converter) until the output voltage and/or output current reach the respective desired levels. The readback values may be obtained by averaging the voltage and/or current readings provided by the ADCs. The averaging may be weighted to improve noise rejection. The digital control loop provides added flexibility to the SMU and a decrease in the accuracy requirements on the DAC, while also for solving potential range-switching issues that may arise within the SMU.

REFERENCES:
patent: 5579236 (1996-11-01), Tamamura et al.
patent: 5754041 (1998-05-01), Kaito et al.
patent: 5970074 (1999-10-01), Ehiro
patent: 7502697 (2009-03-01), Holmquist et al.
patent: 2009/0015221 (2009-01-01), Kodera

Affiliated with

Also associated with

Rating

Source-measure unit based on digital control loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Source-measure unit based on digital control loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Source-measure unit based on digital control loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2687195