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  • Passive RFID Basics
    that includes basic modulation circuitry and non-volatile memory. The tag is energized by a time-varying electromagnetic radio frequency (RF) wave that is transmitted by the reader. This RF signal is called a carrier signal. When the RF field passes through an antenna coil, there is an AC voltage
  • Building a Microwave Frequency Synthesizer-Part 3: From Sketch to Product (.pdf)
    the VCO. Analog Devices'. Resolution: 1 MHz. ADF4106 should be a perfect choice. The part. Tuning Speed: 1 msec. supports the required frequency range and. Output Power: +7 dBm. includes a digital phase-frequency detector,. Spurious: ­60 dBc. both RF and reference dividers as well as lock
  • Fundamentals of the Infrared Physical Layer
    . The solid (conical) angle `Q', representing one. simple. The challenge to the designer is to predict how. steradian, is such that the area `A' of the subtended. much energy is available from which the information. portion of the sphere is equal to R2, where `R' is the. may be extracted. RF designers
  • Building a Microwave Frequency Synthesizer-Part 4: Improving Performance (.pdf)
    . Clearly, increasing the phase. Let's step back to the general single-loop. detector comparison frequency will benefit the. PLL case (Fig. 15). The main impact on the. switching speed and spurious performance. synthesizer performance is posted by large. On the other hand, for a simple single-loop
  • Basic PLL Filters for the rfPICTM - rfHCS
    : Myron Loewen. the phase of the crystal reference signal as shown in. Microchip Technology Inc. Figure 1. The RF output frequency is from a voltage. controlled oscillator (VCO). It is divided by 32 for com-. parison to the reference oscillator. A phase-frequency. INTRODUCTION. detector compares
  • Voltage-to-Frequency/Frequency-to-Voltage Converter
    to a. proportional voltage by the use of a frequency-to-voltage (F/V) converter. A simple voltmeter will then give a visual indication of the. speed. Analog Display. RPM. Speed. TC9400. Sensor. F/V. DVM Display. (Optical or Magnetic). RPM. FIGURE 2: RPM/speed indicator. © 2002 Microchip Technology, Inc
  • Laser Diode Module Testing Critical to Development of High Bandwidth Communication Systems
    to use the existing fiber-optic cable infrastructure. Each wavelength can carry thousands of communication channels. The laser that produces the coherent light beam is part of a complex laser diode module (LDM), which is the optical equivalent of a local oscillator in an RF communication system

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