Title :
A stable differentiator with a controllable signal-to-noise ratio
Author :
Al-Alaoui, Mohamad Adnan
Author_Institution :
Dept. of Autom. Control, Higher Inst. for Appl. Sci. & Technol., Damascus
fDate :
9/1/1988 12:00:00 AM
Abstract :
The feedback properties of operational amplifiers are used in the construction of the differentiator. The basic concept, however is device-independent. Utilizing the tracking properties of feedback and using an integrator for a plant, the resulting error signal will approximate the derivative of the input. The system is stable for positive values of the gain. The signal-to-noise ratio (S/N) is controllable and is inversely proportional to the cubic power of the unity-gain bandwidth. The differentiator can have a higher frequency range of operation than is possible with other methods of design
Keywords :
differentiating circuits; feedback; operational amplifiers; controllable signal-to-noise ratio; error signal; feedback; integrator; operational amplifiers; stable differentiator; tracking properties; Automatic control; Capacitance; Circuit noise; Feedback; Frequency; Immune system; Operational amplifiers; Proportional control; Signal to noise ratio; Thermal resistance;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
