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Laser Diode Driver Stabilizes Sensitivity Parameters: 11/05/98 EDN-Design Ideas / (added 6/06) |
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LCD Direct Drive using HPC: National Semiconductor Application Note (app note added 6/06) |
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LED Driven Tail/Brake Light Cluster: LED driven tail/brake Light Cluster Constant current circuitry 12V Battery operation (added 6/06) |
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LED Driver Application for Portable Products (See also DN23): MicroNote 1312s from Microsem (app note added 6/06) |
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LED Driver Application for Portable Products (See also DN23A): MicroNote 1312 from Microsem (app note added 6/06) |
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LED Driver Application Notes : Technique for adjusting the brightness of LED display modules for brightness compatibility.
Proper brightness binning of LEDs is critical to the fabrication of an esthetically pleasing LED display. Be it a simple, monochromatic, scrolling message board or a full color video display,
the LEDs must .... (added 6/06) |
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LED Driver Combines High Speed Precision: 08/21/03 EDN Design Ideas / (added 1/05) Applications such as
turbidity measurement and densitometry require cleanly pulsed light sources with stable amplitudes. The LED driver in Figure 1 illuminates retinal neurons in a biological experiment that has
similar requirements. For a given LED at a given current, .... |
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LED Driver Delivers Constant Luminosity : 06/12/03 EDN Design Ideas / (added 1/05) The circuit in Figure
1 is similar in principle to that of a previous Design Idea (Reference 1) but offers improved, more reproducible performance. The output current is almost constant over an input-voltage range
of 1.2 to 1.5V and is insensitive to variations of transistor gain. Transistors Q1 and Q2 form an astable flip-flop.... |
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LED Driver Displays Standing Wave Radio: 03/18/99 EDN-Design Ideas / (added 6/06) The circuit in Figure 1 uses an LM3914
LED driver to directly display standing-wave ratio (SWR) in a low-cost, rugged instrument. The SWR-sensing head is derived from the ARRL Antenna Handbookin an article that describes the tandem
match. The forward voltage and reflected voltage (VF+VR ) signal drives Pin 6 (RHI ), and .... |
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LED Driver Displays Standing Wave Ratio : 03/18/99 EDN-Design Ideas / (added 7/03) PDF contains multiple circuits scroll to
find this circuit |
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LED Driver Doubles as Fault Monitor : 09/05/04 EDN Design Ideas / (added 1/05) LEDs find wide use as
indicators and as light emitters in devices such as optocouplers. In some applications, the LED or the emitter may be located remotely at some distance from the main unit. Typical examples are
dashboard-mounted automotive indicators and industrial optosensors. In critical applications, you may require some means of monitoring the integrity of the LED.... |
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LED Driver Provides Oscillator for Microcontroller : 09/16/04 EDN Design ideas Online (added 1/05) The major building
blocks for a white-LED driver are an oscillator, a charge pump, and a regulated current source. You usually use white-LED drivers in tandem with cellular baseband controllers or
microcontrollers. |
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LED Driver Provides Software-Controlled Intensity : 09/30/04 EDN Design Ideas / (added 1/05) Recent
advances in operating efficiency have expanded the use of LEDs from one of mere indicators to becoming driving forces in electronic lighting. Increased reliability and ruggedness (versus other
lighting technologies) gives the LED a bright future indeed. Vendors in recent years have introduced many ICs for driving LEDs, ...... |
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Level Shifter Follows Negative Output : 11/23/94 EDN-Design Ideas / (added 3/03) Transistors Q1 and Q2 in Fig 1, develop a
feedback signal of the proper positive polarity for regulator IC1 from the circuit's negative output. You can use this simple technique to sense any negative-voltage output. The regulator
drives a charge pump comprising L1(Sumida, Arlington Heights, IL, (708) 956-0666), C1, C2, D1, and D2. .... |
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Limiting Amplifier Makes Efficient A/D Converter Driver: 09/02/96 EDN-Design Ideas / (added 11.05) Limiting amplifiers are
useful for protecting circuitry that has a limited input range. A classic example is an input buffer for an A/D converter. Many A/D converters are susceptible to damage if the input
significantly exceeds the specified range. In addition to providing the necessary input-voltage clamping, a .... |
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LIN 2.0 Compliant Driver using the PIC18XXXX Family Microcontrollers: Microchip Application Note Published 27-Oct-05
(app note added 6/06) |
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Line Driver Economically Synthesizes Impedance : 01/06/94 EDN-Design Ideas / (added 3/03) The line-driver circuit in
Fig 1 uses a second op amp to synthesize the output impedance. The conventional line-driver circuit employs a single op amp having a resistor whose resistance is equal to the desired impedance
in series with the op amp's output. The principal drawback of the.... |
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Line Driving and System Design: National Semiconductor Application Note (app note added 2/06) |
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Line-powered driver lights up high-power LEDs: 6/8/2006 EDN Design Ideas / (added 02/07)
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LM3916N bar graph driver: Datasheet in pdf format, drives a 10 LED bar graph with VU proportions (3db/step)... (app note
added 7/06) |
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Low Cost Converter Drives Fluorescent Tubes: 03/31/94 EDN-Design Ideas / (added 6/06) In the last few months, several
designers have published circuits for cold-cathode fluorescent-tube (CCFT) power supplies, and a specialized power-supply IC is also now available. However, a significant number of CCFT
applications don't require the complexity and expense of a dual-FET resonant.... |
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Low Power RS-232c Driver and Receiver in CMOS : National Semiconductor Application Note 05 Oct1998 / (app note added 5/02) |
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LX1686 Backlight CCFL Direct Drive Design Reference (AN-13): Application Note 13 from Microsem (app note added 6/06) |
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LX1995 LED Driver: Camera Flash Application (AN-30): Application Note 30 from Microsem (app note added 6/06) |
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Micropower High-Side MOSFET Drivers: AN53 Linear Technology This application note describes the operation of
high-side Nchannel MOSFET switch drivers designed specifically for operation in battery-powered equipment, such as notebook and palmtop computers and portable medical instruments. A selection
guide simplifies the proper choice of MOSFET and driver for a particular high-side switch.... |
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MOSFET Serves as Ultrafast Plate Driver : 10/03/02 EDN Design Ideas / (added 1/05) The circuit in
Figure 1 provides a 20-MHz square wave across a set of highly capacitive ion-deflection plates in an experimental instrument. To get the required deflection, the plate voltage must be 20 to
30V, much higher voltage than conventional logic or driver families can provide. To minimize artifacts, the rise and fall times must be very fast, with a minimum of overshoot and ringing.... |
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Motor driver - 74*245-based : A simple, time-honored approach is to use one or more 74*245 chips (normally 74AC245 is
used for maximum current capability) to provide motor drive current. Here, each channel of drive power is provided by one or more buffer on chip. (added 1/07) |
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Multiple Relay Drive: Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc. (app note added
6/06) |
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Muscle power drives battery-free electronics: 11/21/2005 EDN Design Ideas / (added 02/07)
Your sweat and a super-cap replace the battery |
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MXP400x Wire Bond: MicroNote 1601 from Microsem (app note added 6/06) |
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New CMOS Vacuum Fluorescent Drivers Enable Three Chip System to Provide Intelligent Control of Dot Matrix VF Display:
National Semiconductor Application Note (app note added 2/06) |
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Novel Process for Vacuum Fluorescent (VF) Display Drivers: National Semiconductor Application Note
(app note added 6/06) |
