GAMMA RAY EFFECT ON OP-AMP 741 AND TIMER 555 IC

The 555 Timer IC

The 555 timer IC was first introduced around 1971 by the Signetics Corporation as the SE555/NE555 and was called "The IC Time Machine" and was also the very first and only commercial timer IC available. It provided circuit designers with a relatively cheap, stable, and user-friendly integrated circuit for both monostable and astable applications. Since this device was first made commercially av...

Op-cvre160028 555..567

Institute of Medical Pathology, Universit a Cattolica, Rome 00168, Italy; Institute of Cell Biology and Neurobiology, National Research Council, Rome 00143, Italy; Institute of Human Physiology, Medical School, Universit a Cattolica, Rome 00168, Italy; Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, Milan 20138, Italy; Department of Cardiovascular Medicine, Univ...

Voltage Feedback ( Vfb ) Op Amp Designed on an " All Npn " Ic Process

High speed analog signal processing applications, such as video and communications, require op amps which have wide bandwidth, fast settling time, low distortion and noise, high output current, good DC performance, and operate at low supply voltages. These devices are widely used as gain blocks, cable drivers, ADC pre-amps, current-to-voltage converters, etc. Achieving higher bandwidths for les...

Operation of 555 Timer Circuit Under Radiation Filed

The 8-pin 555 time rs were exposed to 1,2,3,4, up to 5 Mrads gamma doses, using Co 60 as a gamma radiation source, with a total absorbed doses 5Mrads , the output of the chip, as a square wave indicate that , the electromagnetic wave (gamma radiation) affect in the operation of the timer, as : the parameter changed during radiation noise in the generated square wave, frequency (f) and duty-cycl...

LM555 and LM556 Timer Circuits