Title :
A monolithic video frequency filter using NIC-based gyrators
Author :
Hagiwara, Hisatoshi ; Kumazawa, Masazumi ; Takagi, Shigetaka ; Furihata, Makoto ; Nagata, Minoru ; Yanagisawa, Takeshi
Author_Institution :
Mitsubishi Corp., Tokyo, Japan
Abstract :
A filter system for analog video signal processing is discussed. This system is composed of a variable time-constant active RC filter part with balanced-type negative impedance converters (NICs) and an automatic tuning circuit part using a PLL. The system is implemented by a conventional junction-isolated 15- mu m bipolar process with n-p-n transistors of f/sub T/=400 MHz; features low production cost; and it uses an automatic tuning scheme with better accuracy in response than previous systems. A filter system with a passband from 3.7 to 5.2 MHz, and which operates from a single 5-V supply, was implemented by the bipolar process. Experimental results obtained for the filter system are given.<>
Keywords :
active filters; bipolar integrated circuits; gyrators; phase locked loops; video signals; 15 micron; 3.7 to 5.2 MHz; 400 MHz; NIC-based gyrators; PLL; active RC filter; analog video signal processing; automatic tuning circuit; balanced-type negative impedance converters; bipolar process; monolithic video frequency filter; variable time-constant; Circuit optimization; Costs; Filters; Frequency; Gyrators; Impedance; Passband; Phase locked loops; Production systems; Video signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
