Precision resistor used as a stable reference in current source circuits for accurate current regulation.
A reference resistor is a high-precision, low-temperature-coefficient resistor used in current source cells to establish a stable voltage drop that determines the output current. It serves as the primary accuracy-determining element in precision current sources by providing a known resistance value with minimal drift over time and temperature variations.
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Reference resistors feature ultra-low temperature coefficients (±1-10ppm/°C vs ±100-200ppm/°C for standard), tighter tolerances (0.01-0.1% vs 1-5%), and superior long-term stability (25ppm/year vs 1000ppm/year).
High-quality reference resistors use materials with minimal resistance change versus temperature (low TCR). Temperature-controlled environments or compensation circuits further minimize thermal effects on current source accuracy.
Reference resistors require periodic calibration (typically annually), protection from mechanical stress, and operation within specified temperature/power limits to maintain specified accuracy.
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说明目标数量、应用场景、交期和关键技术要求，用于准备 RFQ 或供应商评估。