Quantcast Transformer Coupling

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
1-13 Figure 1-11 shows an impedance-coupling network between two stages of amplification. L1 is the load for Q1 and develops the output signal of the first stage. Since the d.c. resistance of a coil is low, the efficiency of the amplifier stage is increased. The amount of signal developed in the output of the stage depends on the inductive reactance of L1. Remember the formula for inductive reactance: Figure 1-11.—Impedance-coupled transistor amplifier. The formula shows that for inductive reactance to be large, either inductance or frequency or both must be high. Therefore, load inductors should have relatively large amounts of inductance and are most effective at high frequencies. This explains why impedance coupling is usually not used for audio amplifiers. The rest of the coupling network (C1 and R1) functions just as their counterparts (C1 and R2) in the RC-coupling network. C1 couples the signal between stages while blocking the d.c. and R1 develops the input signal to the second stage (Q2). Transformer Coupling Figure 1-12 shows a transformer-coupling network between two stages of amplification. The transformer action of T1 couples the signal from the first stage to the second stage. In figure 1-12, the primary of T1 acts as the load for the first stage (Q1) and the secondary of T1 acts as the developing impedance for the second stage (Q2). No capacitor is needed because transformer action couples the signal between the primary and secondary of T1.


Electrical News
Graphene / Lithium Ion Capacitor Kickstarter BS
I’ve had a lot of people ask me to comment...
eevblog.com
Six Hour Workday? Sign Me Up!
The economists got it wrong when they though productivity gains...
eetimes.com
Geotracker Tags Unlicensed Band
We're tracking a startup budding from San Francisco's Internet of...
eetimes.com
Teardown.com: Amazon Brings Fire to Phone Market
Qualcomm is the primary provider of the key integrated circuits...
eetimes.com
What's That Smell? An App for That Soon, Says Sensirion
With the acquisition of neighbouring cloud business Koubachi AG, Zurich-based...
eetimes.com
Samsung's Silicon Valley Home
Samsung is building a 10-story complex in the heart of...
eetimes.com
Sony Invests in Stacked Image Sensor Manufacturing Capacity
Sony Corp. has said it plans to invest 35 billion...
eetimes.com
Life After 28nm: Think Network-on-Chip
As Moore's Law reverses beyond 28nm, consider network-on-chip (NoC). While...
eetimes.com
NASA Exec Says, 'Boldly Go!'
Pete Worden, director of NASA's Ames Research Center, challenged a...
eetimes.com
Friday Quiz: Decibels and S Parameters
Test your knowledge of that ratio of two powers and...
eetimes.com
Freescale, with Solid Q2 Growth, Milks Auto IC Boom
Revenues of Freescale's five key product groups grew across the...
eetimes.com
Tricky Dicky Makers
Dick Smith Electronics (known colloquially as Tricky Dicks here in...
eevblog.com
IPC Releases Electronics Quality Survey
The annual survey provides insight into how electronics manufacturers are...
eetimes.com
7 Black Hat Sessions Sure to Cause a Stir
At Black Hat, researchers will point out the weaknesses in...
eetimes.com
Jibo Wants To Be Your Family's First Robot
Meet Jibo, a connected personal assistant that aims to be...
eetimes.com
Google, Facebook Clash at Con
Google and Facebook will share their visions of datacenter networking...
eetimes.com
Nadella's Windows 9 & Device Plans Explained
Microsoft CEO Satya Nadella says his company is "streamlining" Windows...
eetimes.com
Apple OS X Yosemite Beta Debuts
Apple's obsession with secrecy gives way to involving customers in...
eetimes.com
60 GHz Startup Targets Mobile
On the heels of Qualcomm's acquisition of 60 GHz chipset...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +