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High-pass filter circuit

2015-02-06 14:01  
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High-pass filter circuit
High-pass filter (HPF) cuts off signal frequency which is below -3dB cutoff frequency and allows for signal frequency which is above the cutoff frequency. Figure (a) and Figure (b) show single high-pass filters. These are inversions of LPF single low-pass filters. Capacitance is placed in series in the signal path but the inductance is placed in parallel in the signal channel. The model shown in the figure (a) is T-shaped structure that shown in the figure (b) is Ⅱtype filter.