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  • A Dual-Band Switchable IF VCO for GSM/PCS Handsets
    shows that the loop power and QL are. contradictory parameters. That is, an increase of Q. path. Simple analysis shows that the current flowing through the. L leads to. more losses in the feedback path resulting in lower loop power. switching component in the intraresonator scheme may be more
  • Basics of Dual Fractional-N Synthesizers/PLLs
    as illustrated in Figure 1. A. the tuning voltage of the VCO so that its phase is retarded or. programmable divider is a loadable digital counter. Its output. advanced. The loop is designed so that the phase error is. completes a cycle every N VCO cycles, much like a simple. corrected. frequency
  • Building a Microwave Frequency Synthesizer-Part 3: From Sketch to Product (.pdf)
    . cations to production. steps. In this article, a. the customer’s own equipment. simple single-loop PLL. Obviously, the specification is not com-. example is used to demonstrate the most. plete; however, we have enough information to. important aspects of the design process,. start defining
  • Basic PLL Filters for the rfPIC TM - rfHCS
    phase noise. Increasing. because it is the lowest order filter that gets the desired. the bandwidth further will make the spurs dominate the. bandwidth and phase margin performance. This simple. transmitted noise. For a narrow band receiver it may be. circuit is easy to analyze and uses only three
  • Basic Gyroscope Spin Motor Excitation Requirements For USD Gyroscopes
    discusses the building blocks for the most basic gyroscope spin motor excitation supply. The. intent here is to give those not familiar with 2 phase hysteresis induction motors some insight as to what is. required to operate the motors. A block diagram of a simple gyro spin motor excitation supply is shown
  • Building a Microwave Frequency Synthesizer-Part 4: Improving Performance (.pdf)
    . A simple solution to overcome this problem. to be 10000 that corresponds to 80 dB phase. is presented in Figure 37. The idea is to. noise degradation. Moreover, programmable. increase both phase detector input and VCO. dividers are usually not available at high fre-. output frequencies by K times
  • Discrete RF Semiconductors: Alive and Well
    on the order of several milliamperes at 3 to 5 Volts. Schottky diode detectors could not be much simpler to implement: the simplest version. consists of a single Schottky diode, a capacitor, a resistor and possibly RF choke,. configured as a simple half-wave rectifier. No external DC power supply
  • Fractional-N Synthesizers (.pdf)
    Synthesizers have been used for many years to. analog correction in the design of its very popular 2022. improve the performance of indirect frequency synthesizers. A. 10 kHz to 1 GHz Signal Generator (Fig. 2) to provide 10 Hz reso-. simple indirect synthesizer uses a phase-locked loop (PLL) con-. lution

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