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Digitally Control Gain over a ±40 DB Range - 09/12/97 EDN-Design
Ideas..... digitally control an amplifiers gain over a ±40-dB range gain
Resolution of1.25 dB..... EDN is migrating links. This link is not
verified. Google the "title" EDN for new link. |
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Digitally control room light intensity - 11-Nov-04 Issue of EDN
Many people favor different light and temperature settings for different
rooms depending upon their mood or whether they are working or relaxing.
The circuit in Figure 1 controls the intensity of the artificial light in
a room and monitors the temperature of two zones. The two main circuit
blocks are the PIC16C67 master controller and the ADT7516
temperature-sensor interface, which includes a..... [Design Idea by Donal
McNamara and Kieran Kelly, Analog Devices, Limerick, Ireland] |
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Digitally Controlled Phase Shift Using the DS1669 - Maxim
Application Notes / 975 / Dec-05.....[App Note] |
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Digitally controlled potentiometer sets cutoff frequency -
06/10/99 EDN-Design Ideas.....The traditional method of controlling the
upper cutoff frequency in the basic inverting-amplifier circuit of Figure
1 is to add capacitor C in parallel with R2. The value of C controls the
cutoff frequency. R1 and R2 independently establish the magnitude of
the circuit gain, which..... [Design Idea by Chuck Wojslaw, Xicor Inc,
Milpitas, CA] |
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Digitally Programmable Gain & Attenuation Amplifier Design - AN-137 Analog
Devices Application Notes.....[App Note] |
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Digitally programmable instrumentation Amplifier offers autozeroing -
10/30/08 EDN-Design Ideas.....The current trend in advanced instrumentation amps is to
use no external resistors. In these amplifiers, a gain-control word, comprising a
binary-coded one, sets the voltage gain. Several integer gains within one to 1000 are
currently available; however, this range does not..... [Design Idea by Marián Štofka,
Slovak University of Technology, Bratislava, Slovakia] |
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Digitally programmable resistor serves as test load - 3-Mar-05 Issue of EDN
Figure 1 illustrates a digitally programmable precision resistance that can serve as a
microprocessor-driven power-supply load in custom-designed ATE (automatic-test
equipment]. An 8-bit current-output DAC, IC1, a DAC08, drives current-to-voltage
converter IC2A, which in turn drives the gate of power MOSFET Q1..... [Design Idea by
Francesc Casanellas, Aiguafreda, Spain] |
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Digitally programmable-gain amplifier uses divergent exponential curve -
8-Jan-09 Issue of EDN The divergent-exponential and negative time constants are
the core concepts of the DENT
(differential-divergent-exponential-negative-time-constant] digitally
programmable-gain-amplifier topology..... [Design Idea by W Stephen Woodward, Chapel
Hill, NC] |
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Digital-Volume Control - This circuit could be used for replacing your
manual volume control in a stereo amplifier. In this circuit, push-to-on switch S1
controls the forward (volume increase) operation of both channels while a similar
switch S2 controls reverse (volume decrease) operation of both channels.….....
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Dimming DALI Ballast for 32w/T8 110V Input - This reference design is a high
efficiency, high power factor, digital dimming electronic ballast designed to drive
rapid start fluorescent lamp types. The design contains an active power factor
correction circuit for universal voltage input as well as a ballast control circuit
using the IR21592. The design also includes a PIC16F628 microcontroller and an
isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).
(added 3/05) |
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Dimming DALI Ballast for 36w/T8 220V Input - This reference design is a high
efficiency, high power factor, digital dimming electronic ballast designed to drive
rapid start fluorescent lamp types. The design contains an active power factor
correction circuit for universal voltage input as well as a ballast control circuit
using the IR21592. The design also includes a PIC16F628 microcontroller and an
isolation circuit for connecting to a Digitally Addressable Lighting Interface (DALI).
(added 3/05) |
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Dinsmore 1490 Digital Compass - (circuit / schematic design added 6/06)
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Direct Digital Synthesis DDS - A tutorial giving information about the
basics of direct digital synthesis and synthesizers with phase generator, accumulator,
digital to analogue converter, and mentioning the alias problem that can occur. (added
3/06) |
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Dose Rate Response of Advanced CMOS Products - National Semiconductor
Application Note (app note added 2/06) |
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Downloading Hex Files to External Flash Memory using PIC17cxxx Picmicro ®
MicroControllers - Microchip Application Note Published 6-Nov-98 (app
note added 2/06) |
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DRAM SIMM - (application / block diagram added 6/07) |
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DRCS: CLC5526/CLC5956/CLC5902 Diversity Receiver Chipset - National
Semiconductor Application Note (app note added 2/06) |
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DS1620 based USB Digital Thermometer - I connected a DS1620 digital
thermo-censor by Dallas Semiconductor to the Morphy Planning's USB-IO to build a
PC-accessible digital thermometer. The DS1620 chip supports 3-wire (SPI) protocol and
allows loose timing, so you can easily build a thermometer with it. It provides ¬0.5
centigrade accuracy, which should be sufficient for room temperature.… [Site is under
construction right now] |
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DS1621 pc thermometer - ….(Circuit design added 08/08) [Site is under
construction right now] |
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DS1669 Digital Potentiometer - The DS1669 Dallastat™ is a single digital
rheostat or potentiometer with access to all three potentiometer terminals. The
potentiometer has 64 wiper positions with equal or linear resistive step sizes.
This device has both positive and negative 8V (max) supply inputs for maximum wiper
outputs.....(circuit added 07/07/07) |
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DS1821 Programmable Thermostat - (electronic circuit added 4/05)
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DS18S20 1-Wire Digital Thermometer - The DS18S20 digital thermometer
provides 9-bit Celsius temperature measurements and has an alarm function with
nonvolatile user-programmable upper and lower trigger points. The DS18S20 communicates
over a 1-Wire bus that by definition requires only…(circuit added 04/05/06)
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DS92lv16 Power Up Reset - National Semiconductor Application Note (app
note added 2/06) |
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Dual DC motor speed control with reverse - I built this way back in 2000 to
power a remote control "tank" I built in high school. Circuit schematic, source code,
and pictures of the project are all shown….. [Paul Wilkins' web site] |
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Dual DC motor speed control with reverse - Here is a design for a DC motor
speed control featuring: Efficient PWM H-bridge MOSFET architecture, Supply (battery)
voltage range from 4.2 to 13 volts , and more…. [Paul Wilkins' web site] |
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Dual Polarity Amplifier has Digital Control - 09/12/96 EDN-Design
Ideas.....The circuit in Figure 1 can amplify a signal either in an inverting or a
noninverting mode. When switch S1 is on and S2 is off, the circuit behaves as a
regular inverting amplifier. When S2 is on and S1 is off, the circuit feeds the signal
to the noninverting input of the op amp; thus, the circuit behaves as a noninverting
amplifier. If S1 and S2 are monolithic analog switches, you..... [Design Idea by Rick
Downs, Dallas Semiconductor Corp, Dallas, TX] |
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Dual Stepper Motor Driver for a Robot Differential Drive - This article
describes the hardware and the software used to control two stepper motors suitable
for a robot differential drive.The circuit accepts two 2-bit words that command each
of the motors to go forward, backward, hold a position, or to idle. It also provides
an output signal when a step is being taken. It is a flexible design allowing for
unipolar and bipolar motors..... [Author: J.- L. (John) Girard] |
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Dynamic Characteristics of Tracking Converter - AN-264 Analog Devices
Application Notes (app note added 2/06) |
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