Switched-capacitor filter circuit having at least one simulated inductor

In a switched-capacitor filter circuit having first and second input terminals and an operational amplifier having a capacitor connected between the output and the inverting input thereof, said operational amplifier further having a non-inverting input connected to a reference potential, the improvement of:

• a first clock pulse-controlled switch interconnected between the inverting input of said operational amplifier and a first circuit node;
• a first capacitor interconnected between said first circuit node and said reference potential;
• a second clock pulse-controlled switch interconnected between said first circuit node and a second circuit node;
• a second capacitor interconnected between said second circuit node and said reference potential;
• a third clock pulse-controlled switch interconnected between the inverting input of said operational amplifier and said second circuit node;
• a fourth clock pulse-controlled switch interconnected between the output of said operational amplifier and said second circuit node;
• and
• a fifth clock pulse-controlled switch interconnected between said second circuit node and said first input terminal,
• said first and fifth clock pulse-controlled switches being closed during a first clock pulse and said second, third and fourth clock pulse-controlled switches being respectively closed during a second, a third, and a fourth clock pulse, said first, second, third and fourth clock pulses being sequential and non-overlapping.