Programmable Resistor

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  • Current Sense Resistors
    Sudden current or voltage changes are often hazardous to electronic products. For example, transients or surges that reach microprocessor or memory components can destroy those expensive parts, and wipe out critical programming and data. Many electronic products now include surge protection
  • Care and Feeding of the PIC16C74 and Its Peripherals
    A/D value may float around. The second trimpot is only used to show a method of changing A/D input pins. If you are using the PICDEM 2 board, then the LED and a current limiting resistor must be connected to the PWM output. When the program is run, the RS-232 terminal will display two A/D values
  • Bridge Sensing with the MCP6S2X PGAs
    Resistive sensors configured as Wheatstone bridges are primarily used to sense pressure, temperature or loads. An external A/D converter (ADC) and a digitally Programmable Gain Amplifier (PGA) can easily be used to convert the difference voltage from these resistor bridge sensors to usable digital
  • Using Digital Potentiometers to Design Low-Pass Adjustable Filters
    own set of filter requirements (i.e., settling time, fast transition region, etc.). Consequently, a variety of filters may be required in the circuit prior to the multiplexer. Usually these filters are implemented with operational amplifiers (op amps) in combination with fixed resistors
  • System Supervisors in ICSP TM Architectures
    biased designed into systems where microcontrollers (MCUs) diode. Lastly, since the output stage is open drain, a and programmable logic devices (PLDs) are pro- pull-up resistor is required between the supervisor out- (R) micro-grammed in-circuit. Programming PICmicro .put and V DD controllers

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