• All files
• Schematic and PCB (Eagle)
  

For Mirco Siercke in Aephraim Steinberg's lab.  The Top Trap Asymmetry circuit is an AF variable gain amplifier.  With a steady input signal, an analog control input adjusts the gain from zero to 2.5.  Specs are:

• Input (typical), V_i:  5.4KHz at 0-2V_rms, AC coupled.
• Output range, V_o:  5V_rms max.
• Control input range, V_c:  0 to +5VDC working, -5 to +10V absolute maximum.
• Gain transfer curve:  V_o = 0.5 * V_i * V_c
  
• Gain range (reference only):  0 to 2.5
  

The circuit is a stripped down version of the RF Phase Shifter and uses the latter's Rev:B PCB.