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Circuit distorts duty-cycle for CML inputs - 5-Aug-04 Issue of EDN
To test a gigabit-speed data-recovery chip, you need a clock with a
controllable duty cycle. Because most pattern and clock generators have a
fixed duty-cycle output of 50%, the design may require a small circuit to
distort the duty cycle. The signal with controllable duty cycle drives a
standard CML (current-mode-logic] input with on-chip termination
resistors.... [Design Idea by Dieter Verhulst and Xin Yin, Ghent University,
Belgium] |
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Circuit Generates Clean Sine Waves - 06/19/97 EDN-Design Ideas....
EDN is migrating links. This link is not verified. Search the "title"
+ "EDN" for new link. |
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Circuit produces variable frequency, duty-cycle - 24-Jul-03 Issue
of EDN This Design Idea shows a simple, low-cost circuit that produces a
highly accurate variable-frequency and variable-duty-cycle output....
[Design Idea by Mark Reed, Texas Instruments, Dallas, TX] |
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Circuit produces variable numbers of burst pulses - 24-Jun-04
Issue of EDN The add-on circuit in Figure 1 can produce one to 15
burst pulses with the same number of spaces between the bursts at a pulse
width.... [Design Idea by Michael Kornacker, Northrop Grumman Corp, Rolling
Meadows, IL] |
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CK-3V FM Transmitter - Circuit design (added 02/05) |
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CMOS hex inverter generates low-distortion sine waves - 9-Jun-05 Issue of
EDN Audio signal source uses hex inverter and handful of passives.... [Design
Idea by Al Dutcher, West Deptford, NJ; Edited by Brad Thompson and Fran Granville] |
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CMOS IC Audio Oscillator - This circuit consists of a CMOS square wave
oscillator on a frequency of approximately 1 kHz. The RC filter, which has a
roll-off frequency of 500 Hz, filters the harmonics, providing a sine-wave output.
The oscillator has many uses – sidetone circuits in transmitters and signal injectors
for audio tests are just two.... [from Peter Parker's website] |
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CMOS Inverter 125kHz LC Oscillator - This circuit uses a single CMOS
inverter to form a series resonant LD oscillator. The values shown set the
oscillation at about 125KHz buth other frequencies are possible by changing the main
LC values.... [Designed by David A. Johnson] |
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CMOS Inverters Form 125kHz Oscillator - This circuit is similar to schematic
CMOS INVERTER 125KHz LC OSCILLATOR but inverts the LC components so the inductor is
grounded. Two inverters are needed to produce the needed oscillation.
Again, the values shown set the frequency at 125KHz but can be changed to produce
other frequencies.... [Designed by David A. Johnson] |
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CMOS Nand Gate Forms Gated 125kHz Oscillator - This circuit is similar to
schematic number 116 but uses a NAND gate as an inverter. The gate allows the
oscillator to be gated on and off. Again, the values shown set the frequency at
125KHz but can be changed to produce other frequencies.... [Designed by David A.
Johnson] |
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CMOS Oscillator - ASCII format.... |
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Combine source outputs for TOI measurements - Agilent Application
Note....[App Note] |
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Communications-A Catalog of Agilent 8645A Signal Generator Communication Information
- Agilent Application Note (added 6/06) |
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Compensation Extends Oscillator's Range - 12/05/96 EDN-Design Ideas....A
simple technique provides phase compensation for the oscillator in Figure 1a. In this
circuit, a tungsten lamp regulates the amplitude of a crystal bridge oscillator.
This type of oscillator produces a very low-distortion output at a very stable
frequency. The op amp must have a negligible phase shift at the operating frequency,
which.... [Design Idea by Israel Schleicher, Green Spin, Bakersfield, CA] |
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Components of a simple Bandpass filter - Electronic Circuit / Schematic c
(added 02/05) |
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Configurable logic gates'
Schmitt inputs make versatile monostables - 5/25/06 EDN Design
Ideas....You can assemble a pulse-generation circuit from a simple Schmitt-input AND
gate plus a resistor-capacitor timing network. However, if you need a logic function
that’s not a standard catalog item, you need a Schmitt-input gate or inverter....
[Design Idea by Glenn Chenier, Allen, TX] |
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Controlling TDMA Timeslot Power Levels using the ESG-D Series, RF Signal Generators
- Aligent Application Note (app note added 6/07) |
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Convert periodic waveforms to square-waves - 16-Aug-01 Issue of EDN
Converting periodic waveforms to square waves is an integral part of extracting a
clock signal from data, creating waveform generators, and making timing-pulse
generators. Any square-wave-conversion circuit isvaluable when the square wave's duty
cycle is variable and controllable. Figure 1 shows a circuit that has these attributes
and can drive several TTL-compatible loads.... [Design Idea by Ron Mancini, Texas
Instruments, Bushnell, FL] |
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countdown timer may never need battery replacement - 06/23/05 EDN-Design
Ideas....Processor-based timer draws microamps.... EDN is migrating links. This link
is not verified. Google the "title" EDN for new link. |
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CPLD connects two instruments with half duty-cycle generator - 11-Oct-07
Issue of EDN A clocking circuit programmed into a CPLD generates a synchronizing
pulse for a slower instrument at half the duty cycle of a faster instrument....
[Design Idea by Yu-Chieh Chen and Tai-Shan Liao, National Applied Research
Laboratories, Hsinchu, Taiwan] |
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Crystal 32.768kHz CMOS Oscillator - ASCII format (circuit added 06/07/08)
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Crystal Considerations with Dallas Real-Time Clocks RTCs - Maxim Application
Note #58....[App Note] |
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Crystal Controlled Oscillator (Ramon Vargas) - The RF engineer sometimes has
to look for an instrument that will check a low frequency quartz crystal unit reliably
and rapidly. This is a difficult piece of equipment to find and the engineer
often has to consult an electronic circuits handbook for the schematic of a circuit
that will perform the task. Unfortunately, there aren't many such circuits in the
technical literature currently available, and when found, they don't always work as
expected. A circuit that has been found to work at full satisfaction in the frequency
range from 10 kHz to 500 kHz is illustrated in Figure 1. (added 11/05)
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Crystal Controlled Time Base Generator - .... |
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Crystal Filter yields Pure Sine Wave - 06/98 Intersol Application Note #
AN9815 / (app note added 6/03) |
Crystal Oscillator (Chrontel) - Chrontel Application Note-06,This
application note addresses issues commonly raised during the selection of the
reference crystal, typically
14.318 MHz, for Chrontel's product line…..(added 02/05) |
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Crystal Oscillator (Goran Olsson) - ASCII format, The world is full of xtal
oscillators twiddled by digital designers lacking in the analog design knowledge
necessary. Just look at all the PC real time clocks that lags or leads by several
minutes per day. And they eat backup batteries too! IC's with pins that say "Xtal
here" can't be trusted either!.... |
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Crystal Oscillator (Pericom App Note) - Pericom Semiconductor Application
Note # 083....[App Note] |
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Crystal Oscillator Basics & Crystal Selection for RFPIC™ & PICmicro® Devices -
Microchip Application Note Published 17-Jan-02 (app note added 2/06)
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Crystal Oscillator overcomes typical Drawbacks - 08/17/98 EDN-Design
Ideas....A combinatorial function with a propagation delay greater than the system
clock period does not necessarily prevent a design from operating at frequency. By
taking advantage of arrival times or carefully using wait states, a design can give
the combinatorial circuit sufficient time....File has several circuits, scroll to this
one.... [Design Idea by Kevin Skahill, Cypress Semiconductor, San Jose, CA] |
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Current Feedback Amp yields Simple Oscillator - 06/08/95 EDN-Design
Ideas.... EDN is migrating links. This link is not verified. Search the "title"
+ "EDN" for new link. |
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Current Feedback Amps Square Up Fast Signals - 06/23/94 EDN-Design
Ideas....Using current-feedback amplifiers to convert signals from sine waves to
square waves for DSP confers advantages over the more common comparator approaches.
Current-feedback amplifiers have wide bandwidths and relatively small and constant
propagation delays. These small, constant delays help meet the setup-and-hold
requirements of.... EDN is migrating links. This link is not verified. Google
the "title" EDN for new link. |
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CX Minature Crystals Circuits - Euro QuartzCX-6V-SM (added 02/05)
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CX-1SM Crystal 530kHz to2.1MHz - Statek Application Notes (added 02/05)
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