Quantcast BLOCKING OSCILLATOR

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
3-23 Figure 3-29.—Block diagram of a flip-flop with a toggle input. Figure 3-30.—Flip-flop with three inputs (block diagram). Remember, a SET input will SET the flip-flop if it is in the CLEAR state, otherwise, it will not do anything; a trigger at the CLEAR input can only CLEAR the circuit if it is SET; and a trigger applied to the TOGGLE input will cause the bistable multivibrator to change states regardless of what state it is in. Q7.   In a bistable multivibrator, how many trigger pulses are needed to produce one complete cycle in the output? Q8.   How many stable states are there for a flip-flop? Q9.   If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in? BLOCKING OSCILLATOR The BLOCKING OSCILLATOR is a special type of wave generator used to produce a narrow pulse, or trigger. Blocking oscillators have many uses, most of which are concerned with the timing of some other circuit. They can be used as frequency dividers or counter circuits and for switching other circuits on and off at specific times. In a blocking oscillator the pulse width (pw), pulse repetition time (prt), and pulse repetition rate (prr) are all controlled by the size of certain capacitors and resistors and by the operating characteristics of the transformer. The transformer primary determines the duration and shape of the output. Because of their importance in the circuit, transformer action and series RL circuits will be discussed briefly. You may want to review transformer action in NEETS, Module 2, Introduction to Alternating Current and Transformers before going to the next section. Transformer Action Figure 3-31, view (A), shows a transformer with resistance in both the primary and secondary circuits. If S1 is closed, current will flow through R1 and L1. As the current increases in L1, it induces a voltage into L2 and causes current flow through R2. The voltage induced into L2 depends on the ratio of turns between L1 and L2 as well as the current flow through L1.


Electrical News
Ethernet Links Go Green
Everything that uses energy uses too much if it. Energy...
eetimes.com
Android Wear: Where Are the Wares
Here are examples of some of the watches that use...
eetimes.com
Intel Wearables Contest Goes New Age
Emotional prosthetics, modular smartbands and sixth sense necklaces make up...
eetimes.com
EEVblog #658 – Mailbag
Mailbag Monday. Dave opens his mail Spoilers: Keithley 177 Multimeter...
eevblog.com
EEVblog #657 – Maker Faire 2014 Interviews
Some interviews from the 2014 Sydney Mini Maker Faire at...
eevblog.com
The Internet of Things Versus Slumlords
Smart thermostats are not only for the well-to-do. One group...
eetimes.com
IBM Watson Speeds Drug Research
IBM Watson moves from supplying known answers to tough questions...
eetimes.com
Samsung Funds III-V FinFETs in US Lab
Samsung is funding Penn State researchers working to fabricate III-V...
eetimes.com
LG, Samsung Debut Smartwatches, Apple Lurks
LG's G Watch R and Samsung's Gear S do little...
eetimes.com
Imagination Takes On Raspberry Pi
Imagination Technologies has developed its own version of Raspberry Pi,...
eetimes.com
California Smartphone Kill-Switch Law: What It Means
Do you understand the consequences of California's new smartphone anti-theft...
eetimes.com
9 Insights From Hot Interconnects
Facebook described its network switch, while experts picked apart flaws...
eetimes.com
Microchip in Pursuit of CSR
Microchip confirmed Thursday that it has had preliminary mutual discussions...
eetimes.com
Are There Marsquakes on Mars?
A 2016 mission will investigate the stuff under the surface...
eetimes.com
Friday Quiz: Forgotten T&M Companies
Remember the names of these test-equipment companies? Most are long...
eetimes.com
Rohm Opens MEMS Foundry Operation
Rohm Co. Ltd. created a foundry business at the six-inch...
eetimes.com
Touch Taiwan: Display Vendors' 10 Bold Forecasts
Display suppliers are in the know. The companies exhibiting at...
eetimes.com
Power Week: RF Charging Startup & Dialog Semi Team Up for Over-the-Air Power
This week, "over-the-air" power got a boost when RF charging...
eetimes.com
9 Notorious Automotive Electronics Recalls
It's been a banner year so far for automotive recalls,...
eetimes.com
Indoor Navigation: The Next Big Thing
Custom system-on-chip from parent company mCube enables Ten Degrees to...
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 +