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 !