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DCC Waveforms & Voltage information - This page attempts to show
the voltage waveforms associated with model railroad DCC systems as they
would be seen with an oscilloscope. Also methods of measuring DCC system
voltages and currents are shown. |
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DDS and converter form signal generator - 20-Feb-03 Issue of EDN
Many applications require low-frequency signal generators that can deliver
high-performance, high-resolution signals. This Design Idea presents a
circuit that generates frequencies of 0 to 1 MHz. Sinusoidal, triangular,
and square-wave outputs are available. You can achieve frequency resolution
of better than 0.... [Design Idea by Colm Slattery, Analog Devices,
Limerick, Ireland] |
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DDS circuit generates precise PWM waveforms - 2-Oct-03 Issue of
EDN Pulse-width modulation is a simple way to modulate, or change, a
square wave. In its basic form, the duty cycle of the square wave ....
[Design Idea by Colm Slattery, Analog Devices, Limerick, Ireland] |
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DDS device produces sawtooth waveform - 10-Jul-03 Issue of EDN Ramp or
sawtooth waveforms are useful for a broad range of applications, including
automatic-test equipment, benchtest equipment, and actuator control. Discrete
components typically set the waveform frequency. Unfortunately, drift in these
component values over.... [Design Idea by Niamh Collins, Analog Devices, Limerick,
Ireland] |
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DDS using AD9835 - (Circuit design added 8/03) |
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Design & Construction of a Pulsed Linear Induction Motor - Unlike
loudspeakers, headphones generally require some equalization to achieve the most
balanced sound. This article examines several passive and active equalizer
designs that frequently appear in circuit compendiums. All of them are portable, and
the active versions can be powered from batteries....Designed by HeadWize
(Circuit design added 04/05/06) |
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Design & Construction of Radio Frequency (RF) Oscillators - Electronic
Circuit design (added 02/05) |
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Designing & Testing CDMA2000 Base Stations - Agilent Application Note
(added 6/06) |
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Digital countdown timer may never need battery replacement - 23-Jun-05 Issue
of EDN Processor-based timer draws microamps.... [Design Idea by Mark E Buccini,
Texas Instruments, Houston, TX; Edited by Brad Thompson and Fran Granville] |
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Digital signal controls sine generator - 15-May-03 Issue of EDN The
circuit of Figure 1 produces an accurate, variable-frequency sine wave for use as a
general-purpose reference signal. It includes an eighth-order elliptic,
switched-capacitor lowpass filter, IC3, which uses a 100-kHz square-wave clock signal
that microcontroller IC2 generates. (Any other convenient square-wave source is also
acceptable.... [Design Idea by Simon Bramble, Maxim Integrated Products, UK] |
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Digital Signal Processor DSP for Radio Communications - (electronic circuit
added 7/03) |
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Digital Signals produce Pure Sine Waves - 10/09/97 EDN-Design
Ideas....Analog oscillators produce excellent sine waves but are temperamental and
hard to design. They also require extensive redesign every time you change the
oscillation frequency. Digital oscillators…. EDN
is migrating links. This link is not verified. Google the "title" EDN for new
link. |
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Digital waveform generator provides flexible frequency tuning for sensor measurement
- 17-Dec-04 Issue of EDN Variable-resistance sensors convert a fixed dc
excitation voltage or current into a current or voltage that's a straightforward
function of the quantity undergoing measurement. In another class of sensors, moving
objects or fluids produce a sensor signal by altering an LC circuit's inductance or
capacitance.... [Design Idea by Colm Slattery, Analog Devices, Limerick, Ireland] |
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Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD9850 -
AN-419-Analog Device Application Notes....[App Note] |
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DIY Headphone Amplifier With Natural Crossfeed - Some crossfeed acoustic
simulators suffer from frequency-response anomalies (called Comb-filter effects)
because they use a fixed, frequency-independent delay in the crossfeed signal. The
author has developed a crossfeed filter/headphone amplifier with
frequency-dependent….(electronic circuit added 04/05/06) |
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DMA eases CPU's workload for waveform generation - 5-Dec-05 Issue of EDN
Code uses the fewest cycles to implement periodic waveform with DACs.... [Design Idea
by Mike Mitchell, Texas Instruments, Houston, TX; Edited by Brad Thompson and Fran
Granville] |
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DTMF Coder Makes Low Cost Sine Wave Generator - 10/13/94 EDN-Design
Ideas....A telephone DTMF IC produces, by design, two tones if you connect a single
intersection of the IC's 4[x]4 keypad matrix (Fig 1]. (Telephones commonly have 3×4
keypads but, unknown to many people, the applicable standard allows for a fourth row
of four keys.]But, if you connect two key inputs at once, the IC produces a
single-frequency,.... EDN is migrating links. This link is not verified. Google
the "title" EDN for new link. |
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Easily Tuned Sine Wave Oscillators - National Semiconductor Application Note
(app note added 2/06) |
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EICO 320-322 RF Signal generator manual w/schematic - (circuit added
07/07/07) |
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EICO 324 RF Signal generator manual w/schematic - (circuit added 07/07/07)
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Electronic Canary - This circuit is a modified hartley oscillator with a
couple of extra components included. The transformer is a small audio transformer,
type LT700. The primary is center tapped with an impedance of 1Kohms at 1KHz . The
secondary has an impedance of 8 ohms. The inclusion of R1 and C1 give this oscillator
its characteristic "chirp". As the 100u capacitor charges via the 4.7K resistor, R1
the bias for the transistor is cut off. This causes the oscillation to stop, the
capacitor discharges through the base emitter circuit of the transistor and
oscillations start again. Altering these components alters the frequency of the chirp.
The chirp is also voltage dependent. When the push button switch is operated the 100u
capacitor is charged. When its released, the oscillation decays and the chirp becomes
faster. (added 02/05) |
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Enhanced, three-phase VCO features ground-referenced outputs - 19-Jan-06
Issue of EDN Additional components overcome limitations of earlier Design
Idea.... [Design Idea by Harry Bissell Jr, Welding Technology Corp, Farmington Hills,
MI; Edited by Brad Thompson and Fran Granville] |
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ESG Option 201 Real-time IS-2000 Measurements - Agilent Application
Note....[App Note] |
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ESG Series RF Signal Generators Option 200 W-CDMA Personality for the Real-Time
Baseband Generator - Agilent Application Note (added 6/06)
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Expected Voltages & Waveforms - Supertex Semiconductors (app note
added 2/06) |
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