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  • 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
  • KEELOQ(R) Simple Code Hopping Decoder
    a common key and a simplified counter synchronization scheme has been used to reduce the code space requirements. The use of a common key reduces the security of the system. The simple decoder can learn up to 15 encoders. This application note describes the various KEELOQ code hopping encoders
  • Solid State RF/Microwave Switch Technology: Part 2
    In part 1 we discussed an. overview of RF/microwave. switch topologies, PIN. diode theory of operation, and. some simple PIN diode switch. implementations. In part 2 we. will discuss more complex PIN. diode switches, the theory of. operation of RF/microwave field. effect transistors (FETs
  • Designing an FCC Approved ASK rfPICTM Transmitter
    Commission (FCC) compliant board. a capacitor. layout to give new radio frequency (RF) designers a. head start using rfPIC transmitters such as the. As frequencies increase, the PCB traces become. rfHCS362 and the rfPIC12C509A. It guides users. better radiators, which is what we want for a transmitter
  • High Speed Fiber Optic Infrared Transmitter (.pdf)
    inches of the. object being measured. Because of this, the construction of the probe. assembly can vary dramatically. For measurements in an open air. FEATURES. environment, it can be a simple metal cylinder; however, it is not uncommon. · Temperature ranges from. 100 to 1600°C (212 to 2912°F
  • Designing Loop Antennas for the rfPIC12F675
    This application note describes the design of a singleended loop antenna for rfPIC12F675 transmitters. The PCB design will cover all 3 frequency bands from 290 MHz through 930 MHz with a few component value changes The previous Microchip RF transmitters had balanced outputs which required twice
  • Reduce Load Capacitance in Noise-Sensitive, High-Transient Applications, through Implementation of Active Filtering (.pdf)
    Power architects engaged in designing systems requiring low output noise and fast transient response, such as RF Transmitters, Power Amplifiers, Test Systems, Displays, designs supporting low voltage ASICs and Laser Diode Transmitters, understand that when attempting to tailor power systems to meet
  • Make Accurate Sub-1 dB Make Accurate Sub-1 dB Part 1: Noise Concepts
    by the fact that. S N. o. o. modern RF systems are increasingly powered. by batteries which necessitates the reduction. The noise factor therefore expresses the. in transmitter output power, which commen-. degradation in the signal to noise ratio caused. surately reduces signal levels at the receiver

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