Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)
Ask More Info Of  A Seminar Ask More Info Of A Project Post Reply  Follow us on Twitter
30-03-2012, 01:28 PM
Post: #1
Transistor as an Amplifier ppt
Transistor as an Amplifier

.pdf  amlifier work of transistor.pdf (Size: 124.38 KB / Downloads: 205)

• How do we use the transistor as an amplifier?
• First, we must connect it appropriately to the supply voltages,
input signal, and load, so it can be used
• A useful mode of operation is the common-emitter configuration

Common Emitter Configuration
• To make a practical circuit, we have to add bias and
load resistors to ensure the transistor is at the
desired operating point (operating in the right current

How it works
• A signal, such as music from a CD player, is applied to the input
• Let’s examine what happens when such a signal increases the
base voltage by DVin.
• The emitter voltage is always 0.7V below Vb, so if Vb changes by
DVin , so does Ve.
• Thus the emitter current increases by DVin /Re.
• But Ic=-aIe@-Ie, so it also increases by DVin /Re.
• Thus the voltage at the collector will increase by
-DVin RL/Re (that is, it will decrease)
• In this case RL/Re is 10, so the circuit amplifies
the input voltage signal by a factor of -10.
• In general, the gain is -RL/Re. The negative sign
indicates that a increase in input voltage leads to
a decrease in output voltage.
• This is an example of an inverting amplifier

Improved Voltage Regulator
• Buffer regulated zener diode output with transistor in
emitter follower (common collector) configuration.
• Current output from zener boosted by b (50-200)
• Less current drawn in standby mode
• Need to boost zener voltage by 0.7V.

Relay Driver
• Here the transistor is used as a switch to close relay
contacts by driving the coil.
• Note the need for the flyback diode to prevent
damage to the transistor from the high voltages
created by the coil when the current is switched off.
Rating Transistor as an Amplifier ppt Options
Share Transistor as an Amplifier ppt To Your Friends :- Seminar Topics Bookmark
Post Reply 

Marked Categories : about transistor ppt, saminor on transistor as an amplifier, tansistor as an amplifier ppt, transistor as amplifier ppt presentation, ppt on transistor amplifier, transistor seminar project ppt, how transistor works as an amplifier ppt, ppt transistor, seminar topics on transistors, transister as a amplifier ppt, transistor ppt topics, trensistor as current amblifier ppt, general transistors ppt, amplifier ppt, ppt on transistor as an amplifier, tranistor as amplifier ppt, transistor as a amplifier ppt, transistor as an amplifier, transistor acts as an amplifier ppt, operating point of transistor ppt, transistor as an amplifier ppt, transistor amplifier ppt,

Quick Reply
Type your reply to this message here.

Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  ELECTRIC TRACTION ppt seminar ideas 2 8,085 11-10-2016 04:50 PM
Last Post: jaseela123
  THIN FILM TRANSISTOR PPT study tips 1 1,322 05-09-2016 05:54 PM
Last Post: computer science crazy
  INTRODUCTION TO ELECTRIC DRIVES PPT project girl 2 4,146 29-07-2016 12:03 PM
Last Post: jaseela123
  ppt on Transformer seminar flower 4 4,554 18-07-2016 03:43 PM
Last Post: jaseela123
  Recent trends in power generation and transmission ppt study tips 2 2,840 25-04-2016 11:47 AM
Last Post: mkaasees
  MOSFET Transistor dhanabhagya 0 181 12-02-2016 04:17 PM
Last Post: dhanabhagya
  Mobile CHARGING BY HEARTBEAT PPT project girl 11 4,771 28-01-2016 11:25 AM
Last Post: mkaasees
  Biomedical Signal Processing PPT study tips 2 1,753 30-12-2015 10:00 AM
Last Post: mkaasees
  Electrical Transients in Power System ppt project girl 1 3,212 27-10-2015 02:11 PM
Last Post: Guest
  Full Wave Rectifier PPT seminar flower 2 6,060 12-10-2015 07:18 PM
Last Post: Guest
This Page May Contain What is Transistor as an Amplifier ppt And Latest Information/News About Transistor as an Amplifier ppt,If Not ...Use Search to get more info about Transistor as an Amplifier ppt Or Ask Here