In this paper, a novel technique for the design of two-channel Quadrature Mirror Filter (QMF) banks with linear phase in frequency domain is presented. To satisfy the exact reconstruction condition of the filter bank, low-pass prototype filter response in pass-band, transition band and stop band is optimized using unconstrained indirect update optimization method. The objective function is form...

A novel multifunctional negative group delay circuit is proposed. The can realize three different functions, including band-pass, high-pass and low-pass, which meet conditions with capacitance, inductance resistance. Analytical design equations are provided. effects of element values on the bandwidth, cut-off frequency minimum analyzed. According to this method, designed fabricated. Simulation ...

So effectively, you can say that the capacitor acts as a low-pass filter when it in a transistor circuit, it blocks the DC and acts as a low impedance path for AC. Official Full-Text Publication: Single Transistor Active Filters: What is Possible and The results presented here fill both a circuit-theoretic gap and an application-oriented gap related to single a case is the low-pass filter numbe...