Title :
Monolithic tunable notch filter
Author_Institution :
Precision Monolithic, Inc., Santa Clara, CA, USA
Abstract :
A MONOLITHIC SECOND-ORDER state variable filter has been realized using a standard bipolar technology. It is a continuous time filter configured to provide notch, bandpass and lowpass functions, and is tuneable over three decades of frequency by the ratio of two external dc voltages. It has a 90dB dynamic range,>4OdB power supply rejection, a response with a notch depth >50dB, and temperature drift of E200ppm. It does not require the clock input of the switched-capacitor filters????, or accurate passive components of RC active filters. It can serve as standalone filter.
Keywords :
Active filters; Band pass filters; Capacitors; Circuit noise; Frequency; Power supplies; Resistors; Solid state circuits; Temperature; Voltage;
Conference_Titel :
Solid-State Circuits Conference. Digest of Technical Papers. 1981 IEEE International
Conference_Location :
New York, NY, USA
DOI :
10.1109/ISSCC.1981.1156207
