Student: Deaconescu Ionuţ-Cosmin Proffesor: PhD. Eng. Zdzislaw Polkowski Polkowice, Poland 2013 Introduction Pulse wave Rectangular wave Pulse generator Rectangular wave generator Conclusions Bibliography In this presentation is being presented on pulse and rectangular wave generator as a measuring device. This presentation describes about pulse wave and rectangular wave generator.. A pulse wave is a kind of non-sinusoidal waveform that is similar to a square or rectangular wave. The exact shape of the wave is determined by the duty cycle of the oscillator. The pulse wave is also known as the rectangular wave, the periodic version of the rectangular function. The Fourier series expansion for a rectangular pulse wave with period T and pulse time τ is: A rectangular wave is a kind of non-sinusoidal waveform, most typically encountered in electronics and signal processing. Rectangular waves are universally encountered in digital switching circuits and are naturally generated by binary (two-level) logic devices. They are used as timing references or "clock signals", because this have a fast transitions. The Pulse Generator block generates square/rectangular wave pulses at regular intervals. The block's waveform parameters, Amplitude, Pulse Width, Period, and Phase delay, determine the shape of the output waveform. The following diagram shows how each parameter affects the waveform. The Pulse Generator can emit scalar, vector, or matrix signals of any real data type. Depending on the pulse's waveform characteristics, the intervals between changes in the block's output can vary. For this reason, a time-based Pulse Generator block has a variable sample time. A rectangular wave is similar to the square wave. The difference is that in the rectangular waveform, the two alternations of the waveform are of unequal time duration shows that the negative alternation (pulse) is shorter (in time) than the positive alternation. The duty cycle of a pulse generator may vary. Very short duration pulses give a low duty cycle and the pulse generator generally can supply more power during its on period than a square wave. A rectangular wave generators are used whenever the low frequency characteristics of a system are being investigated: testing audio systems, for instance. We don't need to confused with the rectangular wave generator with pulse generator. Between this are differences. The fundamental difference between pulse and rectangular wave generator concerns the duty cycle. Duty cycle is define as the ratio of the average values of the pulse over one cycle to the peak value of the pulse .since the average value and the peak value inversely related to their time duration, the duty cycle can be defined in terms of pulse width and the period or pulse repetition time: Duty cycle = pulse width / period LIŢĂ Ioan D. ,Circuite electronice pentru achiziția de date, MATRIX ROM, Bucureşti, 2008 Electronic instrumentation and measurement techniques by William David Cooper, publishers Eastern Economic Edition (pdf) http://www.phas.ubc.ca/~phys209/files/EXP9.pdf http://www.bel.utcluj.ro/rom/dce/goltean/fec_aai/11_nons inusoidal_oscillators_aai.pdf http://www.navymars.org/national/training/nmo_courses/ nmo1/module9/14181_ch3.pdf http://www.circuitstoday.com/square-wave-generatorusing-op-amp Thank you for attention! Dziękuję za uwagę!