Design of a four-phase high frequency amplitude-stable power supply.
This paper presents a four-phase high frequency amplitude-stable power supply that acts as a rotary electric field generator in biochip research and development. Four channels of high precision frequency signals are generated by DDS(Direct Digital Synthesis). Via two-stage amplifiers these signals are amplified to 50 V(p-p) output within 100 Hz--100 MHz bandwidth on standard 50 Omega load. Via amplitude and phase detection feedback, the output amplitude and phase errors among multiple channels can be stabilized even if load is changeable.
Qihua
Yang
Y
China Jiliang University, Hangzhou, 310018.
D017076:Computer-Aided Design; D011211:Electric Power Supplies; D004560:Electricity; D004581:Electronics; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008904:Miniaturization; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*