Understanding Transistor Function in Control Systems

AI Thread Summary
Transistors play a crucial role in control systems primarily as amplifiers, enhancing weak input signals to deliver stronger outputs. They are integral to circuit configurations that utilize feedback mechanisms, which can be either positive or negative. The efficiency of transistors, characterized by low heat loss and rapid response times, has led to their widespread adoption, replacing less efficient vacuum tubes. Their compact size and power efficiency make them essential in modern electronic devices. Understanding the function of transistors is key to grasping the dynamics of control systems.
weitao
Messages
32
Reaction score
0
in control system, why have so many device like transistor? Wat is them function?
 
Engineering news on Phys.org
The essence of a control system is feedback to control output. It may be positive or negative as described here:
http://en.wikipedia.org/wiki/Electronic_feedback_loops#Types_of_feedback

It's not directly related to a transister but is rather a circuit configuration.


The transister is used primarily as an amplifier, that is, boosting a weak input to provide a more powerful output.
Here is one brief explanation:
http://www.physlink.com/Education/AskExperts/ae430.cfm

Transisters are widely used in many circuits because of their efficiency...very low heat loss for example...and fast response times..they replaced vacuum tubes which used a lot more power and could not be made nearly as small as solid state transisters.
 
Last edited:

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
View full post »

Thread 'Two capacitors, etc.'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
View full post »

Similar threads

Variable Gain Preamplifier using dc control voltage
Replies
9
Views
743
Control Theory -- Systems where the controller also changes with time
Replies
1
Views
1K
NPN transistor overheating even when used with appropriate parameters
Replies
11
Views
3K
Semiconductor technology progress for car controllers (ABS, ESP, ....)?
Replies
6
Views
1K
Need Heavy Duty Transistors for Controlling Larger Motors with PWM?
Replies
18
Views
3K
I am trying to stabilize laser frequency with PID controller
Replies
14
Views
2K
What is the "observer" in PID control?
Replies
12
Views
3K
I don't understand transistors in combinations .... Or maybe basics ....
2
Replies
68
Views
6K
Circuit design question -- 100% transistor functionality needed?
Replies
16
Views
2K
How EMI is handled in IC fabrication?
Replies
14
Views
1K

Hot Threads

Recent Insights

Back
Top