Data Acquisition System uses Fault Protection:  04/15/2004  EDN-Design Ideas  Sensitive systems, such as those in aircraft, must withstand fault conditions, thereby avoiding component and system damage, because a sensor failure could cause a catastrophic event to occur. A channel protector, comprising two n-channel MOSFETs connected in series with a p-channel MOSFET, can protect sensitive components from voltage transients in the signal path, whether or not the power sup... (added 10/05)

Data Com/Telecom Power Supply:  Intersil Application Block Diagram  (app note added 6/06)

Data Conversion Design Techniques for Process Control Applications / AN-42003:  Fairchild Application Notes / (app note added 6/06)

Data Transmission Lines and Their Characteristics:  National Semiconductor Application Note 05 Oct1998 / (app note added 5/02)

DB-15HD VGA Connector:  Make your own KVM or VGA Switch (circuit added 8/06)

DB-9 Connector to DB-25 (Both RS-232):  (electronic circuit added 4/05)

DDS IC Plus Frequency to Voltage Converter Make Low Cost DAC:  02/05/2004  EDN-Design Ideas  Precision DACs are essential in many consumer, industrial, and military applications, but high-resolution DACs can be costly. Frequency-to-voltage converters have good nonlinearity specifications—typically, 0.002% for the AD650—and are inherently monotonic. This Design Idea shows how you can use a frequency-to-voltage converter and a DDS (direct-digital-synthesizer) chip for precise... (added 10/05)

Debugging a PCI Bus with a Mixed-Signal Oscilloscope (5988-7745EN):  Aligent App Note  (added 2/06)

Decoder Safely Drives Data Bus Buffer:  07)/18/96  EDN-Design Ideas  / (added 3/03)      

Design a Low Jitter Clock for High Speed Data Converters:  Maxim Application Notes / 800 / Aug-05  (app note added 6/06)

Design a Visible Optical Link for RS 232C Communications:  01/09/03 EDN Design Ideas  /  (added 1/05)  The design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure of more than 5000V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's COM port. The MC1489 converts the RS-232C data to TTL signals....

Design Considerations for RS-232 Interfaces:  DN27  Design Notes (Linear Technology) (app note added 1/06)

Designing FDDI Concentrators:  National Semiconductor Application Note   (app note added 2/06)

Designing Multiple Function PC Cards:  National Semiconductor Application Note   (app note added 2/06)

Designing Power over Ethernet using LM5070 and DP83865:  National Semiconductor Application Note   (app note added 2/06)

Designing the Input Filter for a Pentium II Processor Converter / AB-16:  Fairchild Application Notes / (app note added 6/06)

Designing USB 2.0 Interface using PI3USB20 Switch:  Pericom Semiconductor App Note # 067 (app note added 02/05)

Designing Video Signal Circuits using PI5V33x Family of Video Switches:  Pericom Semiconductor Application Note # 07)6 (app note added 3/06)

Designing with the LMC835 Digital-Controlled Graphic Equalizer:  National Semiconductor Application Note   (app note added 2/06)

Desktop Computers:  Intersil Application Block Diagram  (app note added 6/06)

Desktop Server:  Intersil Application Block Diagram  (app note added 6/06)

Details of Output Capacitor Selection for Pentium II Processor Converters Using the RC5051 / AB-14:  Fairchild Application Notes / (app note added 6/06)

Differences between National Semiconductor 10/100 MB/S Ethernet Physical Layer Devices:  National Semiconductor Application Note   (app note added 2/06)

Differential to Single Ended Converter:  03/14/96 EDN-Design Ideas  / (added 03/03)      

Digital Audio / Video Switch:  8 channel switch.  (circuit added 8/06)

Digital cameras (AGFA, Olympus) to PC (COM) cable pinout:  (schematic diagram added 2/07)

Digital PBX Linecard and Terminal:  National Semiconductor Application Note   (app note added 2/06)

Digital to Analog Centronics D/A and Filter:  (design circuit added 8/02)

Digital to Analogue Converters for PC Parallel Port:  (electronic schematic / circuit added 11/05)

Disassembler Takes on 8 Bit Intel µPs and µCs :  11/10/94 EDN Design Ideas /  (added 2/06) 

Disco Lights:  software and hardware for controlling disco lights from your PC   (added 4/02)

Disk Drives at 40: Lean Mean Storage Machines:  11/07)/96 EDN-Design Feature / (added 2/06)   The disk drive may have turned 40 this year, but you won't find symptoms of middle age creeping up on this all-star performer. New drives stretch to 9-Gbyte storage capacities and achieve data transfer rates approaching 150 Mbps.—Maury Wright, Technical Editor

Disk Interface Design Guide and Users Manual:  National Semiconductor Application Note   (app note added 2/06)

Dive Computer Interface:  (electronic circuit added 4/05)

DMA eases CPU's workload for waveform generation:  12/5/05  EDN Design Ideas  /  (added 10/06)  Code uses the fewest cycles to implement periodic waveform with DACs.

DMA eases CPU's workload for waveform generation:  12/5/2005  EDN Design Ideas  / (added 02/07)    Code uses the fewest cycles to implement periodic waveform with DACs.

DMX PC Keyboard Interface:  (electronic circuit added 4/05)

Double DAC Rate by using Mixers as Switches:  02/05/2004  EDN-Design Ideas  You can effectively double the sample rate of a DAC by interleaving two DACs into a single unit. Updating each DAC on an alternating basis and switching to the appropriate output double the effective throughput of the overall system. It is essential to overall performance that you use a high-quality, high-speed switch in the multiplexing of the DACs' outputs. (added 10/05)

DP83848 #2:  National Semiconductor Application Note   (app note added 2/06)

DP83848 Single 10/100 MB/S Ethernet Transceiver Reduced Media Independent Interface™ (RMII™) Mode:  National Semiconductor Application Note   (app note added 2/06)

DP83848:  National Semiconductor Application Note   (app note added 2/06)

DP83865 Gig PHYTER V 10/100/1000 Ethernet Physical Layer Design Guide:  National Semiconductor Application Note   (app note added 2/06)

DP83902EB-AT PC AT Compatible DP83902 ST-NIC Ethernet Evaluation Board:  National Semiconductor Application Note   (app note added 2/06)

DP83932 SONIC Bus Operations Guide:  National Semiconductor Application Note   (app note added 2/06)

DP83932EB-EISA SONIC/EISA Packet Driver for PC/TCP:  National Semiconductor Application Note   (app note added 2/06)

DP83950EB-AT IEEE 802.3 Multi-Port Repeater Evaluation Kit:  National Semiconductor Application Note   (app note added 2/06)

DP83956EB-AT LERIC Lite Repeater Interface Controller PC-AT Adapter:  National Semiconductor Application Note   (app note added 2/06)

DP839EB-ATS SONIC Packet Driver for PC/TCP by FTP Software:  National Semiconductor Application Note   (app note added 2/06)

DP8473 Implementation into the PS/2 Floppy Controller Design:  National Semiconductor Application Note   (app note added 2/06)

Drawing Power from a PC Serial Port:  This circuits derives fairly low power, (mA at5V) from a RS-232 serial connection. (NOTE: ASCIII drawing)  (added 4/02)

Dreamcast Interface:  (electronic circuit added 4/05)

Driving a Relay with a CPU:  ASCII format (added 7/02)

DS3662-theBus Optimizer:  National Semiconductor Application Note   (app note added 2/06)

DSP Chip Connects to ADC over Serial Port:  02/01/96 EDN-Design Ideas / (added 6/06) 

Dual-Phase High Efficiency Mobile CPU Power Supply Minimizes Size and Thermal Stress:  DN247  Design Notes (Linear Technology) (app note added 1/06)

Dynamic Memory Allocation for the MPLAB® C18 C Compiler:  Microchip Application Note Published 3-Mar-04   (app note added 2/06)

Dynamic siphon steals current from USB port:  12/15/2006    EDN Design Ideas  / (added 02/07)    Make maximum use of a USB port's current-delivery capability.

EE-139: Interfacing the ADSP-2191 to an AD7476 via the SPI Port:  EE-139 Analog Devices Application Notes  (app note added 6/06)

EE-162 Software Code:  EE-162 SoftwareCode-Analog Device Application Notes  (app note added 6/06) 

EE-236 Software Code:  EE-236 Analog Devices Application Notes  (app note added 2/06)

EE-246 Software Code:  EE-246 Analog Devices Application Notes  (app note added 2/06)

EE-247 Software Code:  EE-247 Analog Devices Application Notes  (app note added 2/06)

EE-248 Software Code:  EE-248 Analog Devices Application Notes  (app note added 2/06)

EEPROM Checksum Information for the ADM1060:  AN-755 Analog Devices Application Note   (app note added 6/06)

Efficient All-In-One USB Power Management IC Solution:  DN1008  Design Notes (Linear Technology)  (app note added 1/06)

Efficient Compact 2-Phase Power Supply Delivers 40A to Intel Mobile CPUs:  DN284  Design Notes (Linear Technology) (app note added 1/06)

Electrical Equipment Control using PC:  (electronic Circuit / Schematic added 10/04)

Embedded Processor Directly Drives LCD:  01/09/03 EDN Design Ideas  /  (added 1/05)  Driving a bare LCD does not necessarily require specialized interface circuitry or peripherals. This Design Idea describes an alternative drive scheme, which you can easily implement using the general-purpose outputs of a microcontroller. Many embedded-system applications need to interact with a user by displaying simple numeric or alphanumeric characters....

Emissions Killers Trap Common Mode Currents:  03/03/98 EDN-Design Ideas  / (added 03/03)   -Unshielded twisted-pair cable that is transformer-coupled to a digital system can easily act as a radiating antenna because of common-mode currents induced by unwanted stray coupling from the digital portions of the system

Enabling Redundancy in Multi-Gigabit Links with DS40MB200 Mux/Buffer:  National Semiconductor Application Note   (app note added 2/06)

Envelope Follower Combines Fast Response Low Ripple:  12/26/02 EDN Design Ideas  /  (added 1/05)  Envelope followers extract amplitude information from complex audio waveforms. The resulting dc voltage often drives nonlinear stages, such as voltage-controlled amplifiers or filters. You must make a careful trade-off between the speed of response to a rapidly changing input signal and the amount of ripple in the dc output that you can tolerate....

Envelope Tracker Quells Jitter:  07)/07)/94 EDN-Design Ideas  /  (added 3/03) Fig 1's envelope tracking circuit solves the problem of receiving ac-coupled NRZ data over a coaxial data link. Because the spectral content of the NRZ data approaches dc (even with alternate frame inversion), the signal tends to integrate in any ac-coupled stage preceding the zero-crossing detector, despite the low cutoff frequencies. Thus, the dc level of the received data wanders, changing the relative switching point at the comparator.....   

EPR-000008 1.2 W Universal Input Non-Isolated TNY254:  This design kit is a 1.2 W, Universal Input, Non-isolated,power supply. The circuit is a fail-safe, non-isolated fly-back topology. Fail-safe means that the output is not subjected to high voltage DC if the switch (U1) fails, since the diode D2 blocks the voltage.  (added 3/05)

EPR-000014 9 V 0.33 a 3 W TNY264 Adapter:  This design kit is a 9 V, 0.33 A, 3 W output and universal input power supply utilizing the TNY264P. For evaluation, a fully built and tested prototype (EP14) can be found within the Design Accelerator Kit, DAK-14.  (added 3/05)

EPR-12 PC Forward Converter with Standby Flyback Power Supply:  This design kit is a a TOP247 forward converter designed for 145 W PC main applications and a TNY266 flyback for PC standby.  (added 3/05)

EPR-16: Linkswitch 2.75 Watt Charger/Adapter:  This design kit is a 5.5 V, 500 mA charger/adapter. The charger uses LinkSwitch – an integrated IC combining a 700 V high voltage MOSFET, PWM controller, start-up, thermal shut down and fault protection circuitry.  (added 3/05)

EPR-31 Multi Output 180 Watt PC Main Power Supply:  This design kit is a 180 W forward converter-based PC mains supply (using TOPSwitch-GX), and a 10 W flyback converter-based PC standby supply (using TinySwitch-II).  (added 3/05)

EPR-33 45 Watt External Adapter Supply:  This design kit is a 12 V, 45 W power supply, with intended application such as W LCD monitor adapters.  (added 3/05)

EPR-34 12 V 30 Watt Universal Input:  This design kit is a 12 V, 30 W universal input flyback power supply, intended as a standard evaluation platform for TOPSwitch-GX.  (added 3/05)

Ericsson Phone to PC Serial Port Interface:  (electronic circuit added 4/05)

ESD Testing for RS-232 Interface Circuits:  DN80  Design Notes (Linear Technology) (app note added 1/06)

Ethernet 10Base T Simulator Jig yields Zero Emissions:  10/22/98 EDN-Design Ideas  / (added 6/06)   

Expanding the HPC Address Space:  National Semiconductor Application Note   (app note added 2/06)

Exploring the Architectures of Network Analyzers:  Aligent Application Note  (added 2/06)

Extending the Applications of 5V Powered RS-232 Transceivers:  DN14  Design Notes (Linear Technology) (app note added 1/06)

External Serial Interface Reduces Simultaneous Switching Output Noise in FPGAs:  National Semiconductor Application Note   (app note added 2/06)