Title :
Comments on "A low-pass biquad derived filter realization"
Author :
Croskey, C. ; Brodie, J.H.
fDate :
6/1/1977 12:00:00 AM
Abstract :
In the above paper, Brodie (see ibid., vol.SC-11, p.552-5, 1976) presents a biquad low-pass filter which requires only two operational amplifiers. The use of current differencing amplifiers for reduced operational amplifier count implementation of the biquad filter has been around for some time. However, Brodie does not mention that the low-pass form is not the only filter that can be achieved. If one allows one additional resistor for biasing, a true bandpass output is available.
Keywords :
Active filters; Low-pass filters; active filters; low-pass filters; Band pass filters; Circuits; Low pass filters; Microwave devices; Microwave filters; Microwave theory and techniques; Microwave transistors; Operational amplifiers; Resistors; Resonance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1977.1050907
