They are typically coupled with a fixed resistor
in voltage division circuits to create a temperature-dependent output voltage.
When the diodes are forward biased the maximum value of attenuation is limited by the value of the fixed resistor
To minimize the impact of etching on resistor tolerance, a fixed resistor
width is recommended, with the resistor length adjusted to achieve the correct resistor value.
By biasing the sensor with an external fixed resistor
, a DC voltage output proportional to the termination's film temperature is obtained.
This article explores some of the factors involved in the selection of fixed resistor
products for this application.
(HBM also constructs gauges with 1/4- and 1/5-bridge designs that require a fixed resistor
to complete the Wheatstone bridge.) Regardless of bridge configuration, energy must be passed through the gauge to excite the circuit.
Each of the six independently programmable channels contains a wiper contact that taps a fixed resistor
at a point determined by the digital code loaded into the SPI-compatible serial-input register.
Each of the four channels in the AD5263 contain a fixed resistor
(20 k[OMEGA], 50 k[OMEGA] or 200 K[OMEGA] with a wiper contact that taps the fixed resistor
at a point determined by the digital code loaded into its register.