Integrated low pass filter and high pass filter circuits

摘要

A low pass filter includes a resistance (3) connected to an input terminal (1) and an output terminal (2) with a first junction capacitor (5). The junction capacitor is connected between the output terminal and a power supply terminal (6). A second junction capacitor (4) is connected between the input terminal and ground. Preferably, a high pass filter has a first junction capacitor connected between the input and output terminals. The input of a level displacement circuit is connected to the input terminal. A second junction capacitor is connected between the output of the level displacement circuit and the filter output terminal. A series circuit of a resistance and a constant voltage source is connected between the high pass filter output terminal and ground.