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
RISC vs CISC: What's the Difference?
A new study comparing the Intel X86, the ARM and...
eetimes.com
MotorMood for socially aware driving
Here is cool idea: use a light-up smiley face that...
wsnblog.com
Calling all Time Lords
2015 is a wonderful year for anyone who has a...
eetimes.com
Talking Sheets, Thinking Shorts
The tagging of garments via RFID-based labels has been commonplace...
eetimes.com
Ericsson Layoffs Target R&D, Supply
Ericsson will release 10% of its Swedish workforce as part...
eetimes.com
Sneak Peak! RTOS Smackdown at ESC Silicon Valley 2015
At ESC Silicon Valley, seven of the leanest, meanest, coolest,...
eetimes.com
Merck Buys Display Quantum Dot Company
Merck KGaA (Darmstadt, Germany) has announced it is acquiring Qlight...
eetimes.com
Bringing More Affinity and Testability to Multicore
To make its affinity-based RTOS scheduling algorithm for multicore software...
eetimes.com
Micron Remains Optimistic Despite Down Quarter
Sluggish PC market affected DRAM growth, but company appears confident...
eetimes.com
Selecting Your M&A Banker
At some point in the life of a technology startup...
eetimes.com
DoT Call for Proposals, Registration Open
The IoT, wearables, and 3D printing-focused Designers of Things conference...
eetimes.com
Automotive King Redefines Future
By 2030 the cost of an automobile will be mostly...
eetimes.com
8 FD-SOI Questions You're Afraid to Ask
Paul Boudre, CEO of Soitec, told us last week in...
eetimes.com
New Architectures Target 5G Power Needs
The next generation of mobile telephony is not so far...
eetimes.com
Synopsys Acquires Elliptic Technologies, Beefs up Security
Synopsys, Inc. is acquiring security intellectual property company Elliptic Technologies....
eetimes.com
EEVblog #759 – Mailbag
A big mailbag episode, getting through lots of backlog. P.S....
eevblog.com
Back in the Driver's Seat on Global Trade
The Trade Promotion Authority (TPA) is a major victory for...
eetimes.com
Back in the Driver's Seat on Global Trade
The Trade Promotion Authority (TPA) is a major victory for...
eetimes.com
Slideshow: IMEC Innovates in Wireless
Here are some wireless innovations from IMEC, one of Europe's...
eetimes.com
Gobsmacking Graphic Novels
Max recently became enthralled with a bunch of new graphic...
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 +