Design of Self-tracking High-pass Filter
College of Physics and Electronic Engineering, Northwest Normal University, 730070 Lanzhou, China
2 Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, 730070 Lanzhou, China
3 College of Electronic Engineering, Lanzhou Institute of Technology, 730050 Lanzhou, China
a Corresponding author: firstname.lastname@example.org
A novel self-tracking high-pass filter by using analog multiplier and current feedback op-Amp (CFA) is proposed in this paper. The frequency-voltage (F/V) converter transforms the input pulse signal into the voltage, and then the output of F/V converter controls the cut-off frequency of voltage controlled high-pass filter. Thus, the cut-off frequency of designed filter is linear with the frequency of input signal in case that resistors and capacitors are reasonable adjusted. The experiment and simulation results show that the cut-off frequency of designed filter is 1 kHz-100 kHz..
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