dBm 2025 program

building test hardware  
 our dBm research system consists of these modules : 
 
 Power supply : USB powered, LiPo battery, 5V out 
 Power starving controller :  voltage and current control with  potentiometers & CV  inputs 
 CMOS oscillator (D.U.T.) : various topologies of Schmitt-Trigger based squarewave oscillators 
 High impedance buffer & amplifiers: line and feedback outputs Potentiometers for gain and feedback 
 C-multiplier:  electronically variable capacitance with potentiometer and CV control. Acts as capacitive load for D.U.T. 
 triple CV out pseudo random pattern generator : for controlling CVs of power staving controller and C-multipliers 
 vactrol module : DIY dual vactrol  with exponential CV control for potentiometer replacement in D.U.T. 
 
 overview experimental dBm setup 
 
 module details 
 WARNING : following schematics , layouts and documentation is WORK IN PROGRESS. Expect many changes during dBm 2025 week !