Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 13: Problem 14

Sketch the circuit of a 555 timer connected as an astable multivibrator for operation at \(350 \mathrm{kHz}\). Determine the value of capacitor \(C\) needed using \(R_{A}=R_{B}=7.5 \mathrm{k} \Omega\).

Short Answer

Expert verified
The required capacitor value for the 555 timer connected as an astable multivibrator with \(R_A = R_B = 7.5 k\Omega\) at resonance frequency \(350 kHz\) is approximately \(2.75 nF\)

Step by step solution

01

Circuit Sketching

For the astable multivibrator, connect pin 2 and pin 6 together. Also connect a capacitor \(C\) from pin 2 to ground. Next, connect resistors \(R_A\) and \(R_B\) in series to the positive power supply, and connect the junction of \(R_A\) and \(R_B\) to the capacitor on pin 2. Pin 7 is connected to the junction of resistors \(R_A\) and \(R_B\).
02

Setting Up The Frequency Equation

Knowing that the frequency of oscillations for an Astable multivibrator is \(f = \frac{1.44}{(R_A + 2 * R_B) * C}\), we can find the value of \(C\) by rearranging this formula to solve for \(C\). Which gives us \(C = \frac{1.44}{f * (R_A + 2 * R_B)}\)
03

Value Substitution

Substitute the given resonance frequency of \(350 kHz\), \(R_A = R_B = 7.5 k\Omega\) into the frequency equation. You get \(C = \frac{1.44}{350*10^{3}*(7.5*10^{3} + 2 * 7.5*10^{3})}\).
04

Solving For C

Finally, calculate the value of \(C\). You get \(C = 2.75*10^{-9} F\) approximately, which is often stated as \(2.75 nF\)

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

For a dual-slope converter, describe what occurs during the fixed time interval and the count interval.

What voltage resolution is possible using a 12 -stage ladder network with a \(10-\mathrm{V}\) reference voltage?

Sketch a five-stage ladder network using \(15-\mathrm{k} \Omega\) and \(30-\mathrm{k} \Omega\) resistors.

Sketch the input and output waveforms for a one-shot using a 555 timer triggered by a \(10-\mathrm{kHz}\) clock for \(R_{A}=5.1 \mathrm{k} \Omega\) and \(C=5 \mathrm{nF}\).

Draw the diagram of a 741 op-amp operated from \(\pm 15-\mathrm{V}\) supplies with \(V_{i}(-)=0 \mathrm{~V}\) and \(V_{i}(t)=+5 \mathrm{~V}\). Include terminal pin connections.
See all solutions

Recommended explanations on Physics Textbooks

Kinematics Physics

Read Explanation

Circular Motion and Gravitation

Read Explanation

Solid State Physics

Read Explanation

Measurements

Read Explanation

Geometrical and Physical Optics

Read Explanation

Oscillations

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free