Precision Ramp Generator Comparator Schematic SPCKT_10001.0

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Precision Ramp Generator Comparator Schematic SPCKT_10001.0

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Category: Special Circuits
Precision Ramp Generator Comparator
Schematic SPCKT_10001.0
Description This circuit generates precision linear ramp from that could stopped within (device under test) desired output. this example ALD1108 MOSFET. voltage this device defined that gate voltage which drain current drain voltage 100mV. challenge this case measure that gate voltage which VDS=100mV drain current IDS=1µA simultaneously. This accomplished using precision current source that supplies calibrated drain while setting precision comparator continuously comparing drain voltage that precision reference voltage 100mV. When ramp voltage increments from V-=-5V, charges holding capacitor measurement accuracy determined accuracy response time comparator time takes subsequently control logic open analog switch stop ramp generator. comparator selected input offset voltage specification 0.2mV. current source accuracy, comparator Input Reference voltage accuracy, input offset voltage buffer operational amplifier precision readout meter contribute measurement error terms. Last least, value well quality holding capacitor leakage currents surrounding this node direct impact leakage currents accuracy readout. general, actual reading using high precision external readout meter obtained within second less total error less than 1mV. high quality such leakage polypropylene type retain measured voltage well over minute without additional errors internal leakage currents. Recommended Components ALD2321 voltage comparator; ALD1107 ALD1110 current source; ALD2722 buffer amplifier ramp generator; ALD4213 analog switch; ALD1502 timing network function Other Related Circuit Ideas
2005 Advanced Linear Devices, Inc. Information furnished Advanced Linear Devices, Inc. (ALD) believed accurate reliable. However, assumes responsibility such information infringement patent rights third parties that result from use. license granted implication otherwise under patent rights ALD. www.aldinc.com

Precision Ramp Generator Comparator Schematic SPCKT_10001.0

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