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
Apple Buys into Augmented Reality -- for Cars?
Munich-based augmented reality software vendor Metaio GmbH has been acquired...
eetimes.com
Google Gestures at 60 GHz
Google unveiled a radar-on-chip for fine gesture control with the...
eetimes.com
Google Unveils Smart Fabric Program
In what might be the largest development in smart fabrics,...
eetimes.com
Extraction Challenges Grow in Advanced Nanometer IC Design
Successive generations of foundry process technologies enable ever-increasing design density,...
eetimes.com
Sensor Data Analytics -- Unlocking Value in 'Big Data'
With data flowing from ubiquitous sensors, the new field known...
eetimes.com
Intel/Qualcomm: The Last Big Move
In the chip game, two big dominoes are waiting to...
eetimes.com
Can Formula E Overtake Formula One?
The Formula E race in Berlin was marred by the...
eetimes.com
EEVblog #748 – How Do Transistors Work?
Dave explains how BJT and MOSFET transistors work at the...
eevblog.com
Friday Quiz: Data Communications
Test your knowledge of the OSI 7-layer protocol stack....
eetimes.com
Can Analog Circuits Inspire Budding Engineers?
Let's face it: when most students looking think about what...
eetimes.com
Thank You, Albert Einstein for GPS
Crazy ideas like time slowing down with velocity or mass...
eetimes.com
Huawei vs. Xiaomi: China in Microcosm
Huawei's technological prowess in telecom and Xiaomi's agility in China's...
eetimes.com
Google Rolls Android M, IoT OS
Developers were audibly excited by the bevy of improvements and...
eetimes.com
Scale & Scalability -- The Keys to True FPGA-Based Verification
Scalable FPGA-based verification has become a serious alternative to big-box...
eetimes.com
A New Broadcom: The First Cuts
The proposed $37 billion merger of Avago and Broadcom creates...
eetimes.com
Micron Bullish On Coming Year
Company president Mark Adams sees poor PC DRAM performance stabilizing...
eetimes.com
When Did Analog Steal Digital's Mojo?
Name two semiconductor companies whose names begin with the letter...
eetimes.com
Avago-Broadcom Deal: What's in It for You?
Where is the affinity - or any apparent good vibe...
eetimes.com
FPGAs Ride HP's Moonshot
SRC Computers announced a new FPGA server card that Hewlett-Packard...
eetimes.com
NXP Agrees to RF Power Business Sell-Off
NXP Semiconductors strikes deal to sell its RF power business...
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 +