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File:Opamprelaxationoscillator.svg

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Original file ‎(SVG file, nominally 644 × 350 pixels, file size: 57 KB)

Summary

Description
English: Transient Analysis of a comparator-based hysteretic oscillator (i.e., a relaxation oscillator implemented with a Schmitt trigger and an RC network) with R=C=1 (unit). The system properties are:
The system is assumed to begin with , , and
Date
Source Own work
Author Krishnavedala
Other versions

File:Opamprelaxationoscillator.jpg

W3CiThe source code of this SVG is valid.
Created using python 
from matplotlib.pyplot import *
from numpy import *

RC, peak = 1., 1.
Vdd, Vss, T, duty = peak, -peak, 2.*log(3.)*RC, .5
Tmax, lim = 3.*T, .01
totalT = linspace(0,Tmax,150)
Vo, Vc, out, vc, n = [], [], Vss, 0., 0.
for x in totalT:
	vc = out * (1. - exp(-x+n*T*.5))
	Vo = append(Vo,out)
	Vc = append(Vc,vc)
	if (vc >= Vdd*0.5) or (vc <= Vss*0.5):
		out = -out
		n = n + 1.
Vr = Vo * 0.5

fig = figure(figsize=(8,4))
ax = fig.add_subplot(111)
ax.grid(True)
ax.plot(totalT,Vo, label=r"$V_{\mathrm{out&#x7D;&#x7D;$")
ax.plot(totalT,Vr, label=r"$V_R$")
ax.plot(totalT,Vc, label=r"$V_C$")
ax.legend(loc='upper right',bbox_to_anchor=(.955,1.),\
	frameon=False,handletextpad=.05)
ax.set_ylim(-1.1,1.1)
ax.minorticks_on()
ax.set_xlim(0,Tmax)
ax.set_xlabel("t",fontsize=15)
ax.set_ylabel("Voltage")

fig.savefig("Opamprelaxationoscillator.png",bbox_inches="tight",\
	pad_inches=.15)

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Date/TimeThumbnailDimensionsUserComment
current05:19, 8 June 2011Thumbnail for version as of 05:19, 8 June 2011644 × 350 (57 KB)Krishnavedala{{Information |Description ={{en|1=Transient Analysis of a comparator-based hysteretic oscillator (i.e., a relaxation oscillator implemented with a Schmitt trigger and an RC network) with R=C=1 (unit). The system properties are: :<math>V_R = \frac {V_{
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