Recent content by C12H17

  1. C

    Phase detector for PLL with low SNR

    any small frequency deviation from the resonance makes a phase to change from +90 to -90. So I need f to be stable at resonance and phase to be stable. My lecturer said that the gain will be minimal. Honestly, I have no idea what I'm doing here.
  2. C

    Phase detector for PLL with low SNR

    The system's purpose is to measure a surface potencial with vibrating zond of a material. The signal is analog and measured with voltmeter. PLL circuit is used to automatically adjust frequency to a resonance f. Because frequency is at resonance the phase is very unstable. By saying low signal I...
  3. C

    Phase detector for PLL with low SNR

    I'm making a system with PLL. Here's more or less a principal scheme. What happens here is that the signal in this compensating system becomes really low and phase detector might not work properly. What I want to ask, what type or how to make a phase detector which can detect phase correctly...
  4. C

    Electrodynamics: Electrostatic field potencial in Cartesian coordinates

    Homework Statement It's given that absolute permitivity is a coordinate function: ε (x, y, z) = Asin(x)cos(y), where A=const Homework Equations We need to find an electrostatic field potential function \varphi in Cartesian coordinate system. The Attempt at a Solution I tired to solve, but...