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  • Implementing Temperature-Based Variable Fan Speed Control in NLX Power Supplies
    consisting of two pulses per fan rotation. 2. FanC is an input to the NLX-compliant power supply used by the motherboard to regulate fan speed and to shut the fan down. FanC is a 0V to 12V analog signal. Implementing Temperature-Based Variable Fan Speed Controller in NLX Power Supplies M
  • Sensorless Field Oriented Control of PMSM Motors using dsPIC30F or dsPIC33F Digital Signal Controllers
    website. ( Two power modules are avail-. ings. Current sensing and fault generation circuitry built. able: one for low voltages (up to 50V) and one for high. into the power inverter protects the overall system. against over currents. voltages (up to 400V). A modified High-voltage Power
  • High Power IR LED Driver Using the PIC16C781/782
    by the receiver. TB062 High Power IR LED Driver Using the PIC16C781/782 TB062. High Power IR LED Driver Using the PIC16C781/782. THEORY OF OPERATION. Author: Keith Curtis. Typical low cost IR remote controls use a modulated. Microchip Technology Inc. linear current source to bias the IR LED
  • Uninterruptible Power Supply Reference Design
    Topology. • Variable Loop Response. • True Sinusoidal Output. • Digital Filtering. • Point-to-Point Output Correction. • Parts and Complexity Reduction. • 1400 VA Rating. • Peripheral Integration. • 120/240 V Input. • Ease of Interfacing. • Testability. • Time to Market. Information contained
  • Soft-Start Controller For Switching Power Supplies
    driven by the power supply is capacitive, the problem is exaggerated due to the large transient currents required to charge the capacitive load. In extreme instances, the repeated high stress of start-up can result in catastrophic failures in the driver section, typically, the power MOSFET transistors
  • AN1106, Power Factor Correction in Power Conversion Applications Using the dsPIC (R) DSC
    AN1106 Power Factor Correction in Power Conversion Applications (R) Using the dsPIC DSC The low cost and high performance capabilities of the Author: Vinaya Skanda DSC, combined with a wide variety of power electronic Microchip Technology Inc. peripherals such as an Analog-to-Digital Converter (ADC
  • 2.5 Mb/s Isolated RS485 Communication Interface With up to 500 mW Supplementary Power
    This application note provides a reference design for a flexible, high power RS485 interface using NEC's PS9821 digital optocouplers and an LMS1487 transceiver from National Semiconductor. 2.5 Mb/s Isolation RS485 California Eastern Laboratories. ApplicAtion note. AN1047. 2.5Mb/s Isolated
  • Trimming The Output Voltage Of DC/DC Converters
    The simplest and least expensive solution is to connect a resistor from the VOUT Adjust pin to the minus (-) reference point or to the plus (+) reference point (positive point where the feedback RF resistor is connected. When a variable voltage source, such as a digital-to-analog converter (D
  • D/A Conversion Using PWM and R-2R Ladders to Generate Sine and DTMF Waveforms
    that value being used for the digital port outputs. The. Figure 3 shows the connection of a R2R ladder. SINE.ASM code example consists of four major. code segments: 1. A main routine for counting and timing the 32. steps of the sine wave. 2. The SetPWM subroutine to pass a new PWM. high and low counter
  • Speed Control of 3-Phase Induction Motor Using PIC18 Microcontrollers
    at its rated speed. However, many applications need variable speed operations. For example, a washing machine may use different speeds for each wash cycle. Historically, mechanical gear systems were used to obtain variable speed. Recently, electronic power and control systems have matured to allow

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  • Satellite Communications Systems: Systems Techniques and Technology 5th Edition Complete Document
    ...applications, expressed in Fit (Failure rate at 75% off-loading ratio—where applicable) Resistors Solid carbon Metallic film... ...Mylar Paper Solid tantalum Variable High voltage Silicon diodes Switching Standard Power Zener Detector/mixer Filter sections... ...HF Power Integrated circuits: Digital (bipolar) Analogue FET IC...
  • Bolometers/microcontroller method of total high frequency space distributed power measurement
    Proposed automation digital variant of bolometric method of space distributed high frequency power measurement the follow preference is given: 1... ...automation, the results is given in the digital form and an instrumentally... ...method with one bolometric resistor in the case of...
  • Kinetics of Rb formation from RbCl in the positive column of the hydrogen-pulsed discharge
    ...grating, W—tuning glass wedge, M—mirror, BS—glass beam splitter, FP—Fabry–Perot interferometer, VA– variable attenuator, PD—photodiode, D1,...,D7—diode (rectifier), R4— high impedance resistor , HVPLS—high voltage modulator (pulser), HVDC—high voltage dc power supply, R2—current limiting resistor... ...load resistor, Amp—amplifier, OSC— digital oscilloscope, ADC—analog to digital...
  • Highly Sensitive Laser Diode Detection of CsCl beam splitter, FP: Fabry-Perot interferometer, VA: variable attenuator, PD: photodiode, D1, . . . ,D7-diode ~rectifier!, R4: high impedance resistor , HVPLS: high voltage modulator... ...HVDC: high voltage dc power supply, R2: current limiting... ...resistor, Amp: amplifier, OSC: digital oscilloscope, ADC: analog to...
  • EEs' Tools & Toys
    ...mouse click The library includes fixed and variable amplifiers, op-amps, several types of power splitters and combiners, couplers... ...It also makes available resis- tor -capacitor differentiators, resistor- inductors, low-pass and high -pass R-C and... ...mixed-mode (analog and digital .
  • Modular Low-Power, High-Speed CMOS Analog-to-Digital Converter for Embedded Systems
    ...structures of the coarse converter Flash A/D converter Resistor string with "worst case" mismatch Schematic of a high -speed comparator Schematic of... ...stage Schematic of low- power comparator Clock timing diagram... ...General principle of the digital synchronization Variable width definition of the...