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  • Input Impedance
    Input impedance of an amplifier is the equivalent impedance that the signal input sees. Impedance (Z) is the resistance to alternating signal flow and is a result of the resistance, capacitance, and the inductance of the circuitry of a device. Input impedance is typically specified to be much
  • Distortion and source impedance in JFET-input op amps
    of two JFET-input op amps for high and low source impedance. A new fabrication process that limits common mode capacitance provides more device options when low distortion is required over a wide range of source impedance.
  • AN721: Impedance Matching Networks Applied to RF Power Transistors, Courtesy of Motorola
    be considered as a corollary of the matching circuit. Matching is necessary for the best possible energy transfer from stage to stage. In RF-power transistors the input impedance is of low value, decreasing as the power increases, or as the chip size becomes larger. This impedance must be matched
  • Input Voltage Standing Wave Ratio (VSWR)
    Input voltage standing wave ratio (VSWR), a unitless ratio ranging from 1 to infinity, expresses the amount of reflected energy at the input of the device. In a system, impedance mismatches cause some of the transmitted energy to be reflected back to its source. The frequency of the signal
  • Application Advantages of LBA Differential Pressure Sensors Due to Their Very High Pneumatic Impedance
    and condensation as well as the use of long connecting tubes and input filters.
  • Matching circuit optimization for antenna applications
    Impedance matching is an essential part of antenna design. The input impedance of an antenna needs to be reasonably close to the amplifier impedance (e.g. 50 Ohm), otherwise the signal is reflected back to the amplifier and not radiated by the antenna.
  • Calculating Settling Time for Switched Capacitor ADCs
    Many of Silicon Lab's devices feature an on-chip SAR analog-to-digital converter (ADC). These ADC's use a sample capacitor that is charged to the voltage of the input signal that is used by the SAR logic to perform its data conversion. Due to the ADC's sample capacitance, input impedance
  • Piezoelectric Measurement System Comparison: Charge Mode vs. Low Impedance Voltage Mode (LIVM)
    Piezoelectric sensors (Transducers) measure dynamic phenomena such as force, pressure and acceleration (including shock and vibration). Inside the sensor, piezoelectric materials such as quartz and man-made ceramics are stressed in a controlled fashion by the input measurand i.e., the specific

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