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΅C Controls Charge Pump as Background Task - 08/01/97 EDN-Design
Ideas: Because of power consumption and cost, designers of
battery-powered devices mainly choose components that run at 3V or
lower. Unfortunately, many devices operate only at 5V, including LCDs
with built-in drivers, programming lines of many EEPROMs and flash
chips, and CMOS ADCs |
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10 Khz VFC uses Charge Pump Variation - 04/09/98 EDN-Design Ideas:
(design idea) |
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100ma UltraLow Noise Charge Pump LED Supply with Output Current Adjust
- Linear Technology LTC3201 (app note) |
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12V Touch Switch Exciter Circuit - This circuit is designed to
generate a 20KHz pseudo sine wave signal that can power about 50 remote
touch activated switch circuits. It can support a cable length of about
2500 feet. A typical remote switch circuit is also shown as well as a
receiver circuit for those switches.
.(circuit designed by David A.
Johnson) |
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200mhz-400mhz Voltage Controlled Oscillator (VCO) - If you need a
clean emitter coupled logic (ECL) type signal between 200MHz and 400MHz
this circuit works fine. It uses four voltage-controlled capacitors to
change the frequency.
.(designed by David A. Johnson) |
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300v Peak to Peak Signal Generator - This circuit converts a square
wave signal to a +-150 volt output signal with fast 100nS rise and fall
times.
.(designed by David A. Johnson) |
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40kHz LED Test Signal Generator - This 40KHz crystal controlled
oscillator circuit drives an infrared LED with powerful 40ma pulses.
The circuit can be used to test optical communications circuits,
designed to receive 40KHz modulated light signals.
.(designed by David
A. Johnson) |
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5V Power Supply Teams Low Dropout Regulator Charge Pump - 01/08/04
EDN-Design Ideas: Auxiliary power of 3.3V is replacing 5V auxiliary
power that "silver boxes" supply in most computer systems, but some
circuits still require a 5V supply. Such systems impose messy task |
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AN152 Using the CS5521/22/23/24/28 & CS5525/26 Charge Pump Drive for
External Loads |
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AN-347: Shielding & Guarding - AN-347 Analog Devices Application
Note (app note) |
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AN-348: Avoiding Passive-Component Pitfalls - AN-348 Analog Devices
Application Note (app note) The Wrong Passive Component Can
Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to
Watch For. |
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AN-349: Keys to Longer Life for CMOS - AN-349 Analog Devices
Application Notes Here's How CMOS Can be
Protected Against Abuse |
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AN-703: Driving High Power LEDs - AN-703 Analog Devices Application
Note (app note) |
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AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale
Package - AN-772 Analog Devices Application Note |
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AN813: Applying the TC1219/TC1220 Inverting Charge Pumps with Small
External Capacitor Values - Microchip Application Note Published
20-Sep-04 |
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Audio Frequency Digital Noise Generator - When you need to test an
audio circuit with broadband noise, this circuit works great. It uses
just three inexpensive C-MOS ICs that generate a series of output pulses
whose widths vary randomly. I included a level control pot.
.(designed
by David A. Johnson) |
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Avoiding Passive-Component Pitfalls - AN-348 Analog Devices
Application Note (app note) The Wrong Passive Component Can
Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to
Watch For. |
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Boost Converter Generates 3 Analog Rails - Maxim Application Note
#2026 In Figure 1, a standard boost converter consisting of IC1, C1, L1,
D1, and C2 generates, in addition to main output, two auxiliary supply
rails (10V and -5V) with addition of some small and very low-cost extra
components. |
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Boost Converter Generates Three Analog Rails - 07/02/98 EDN-Design
Ideas: The standard boost converter in Figure 1 uses not only IC1, C1, L
1, D1, and C2 to generate a main 5V output, but also additional small,
low-cost components to provide two auxiliary
supply rails of 10 and 5V |
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Buck/Boost Charge Pump Regulator Powers White LEDs from a Wide 1.6 Volt
to 5.5 Volt Input - Maxim Application Note #1021 |
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Build a Charge Pump with UltraLow Quiescent Current - 09/05/04
EDN-Design Ideas: Portable battery-powered devices often spend most of
ir life in standby mode, in which quiescent current of an internal
boost converter continuously bleeds battery. The quiescent current
during standby can be larger than |
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Caps Provide Voltage Boost To Series Regulator - This circuit adds
some capacitors and diodes to a traditional transformer type series
regulator circuit to extend the normal operating range. It can insure
regulation during low line voltage conditions or it can squeeze a few
more watts out of a plug-in-the-wall power adapter power supply.
.(designed by David A. Johnson) |
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Charge Pump & Step Up DC DC Converter Solutions for Powering White LEDs
in Series or Parallel Connections - Maxim Application Note #1037 |
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Charge Pump Circuit Divides by Two - 02/18/99 EDN-Design Ideas:
Small size and efficiency approaching 100% make switched-capacitor
charge pumps popular for voltage doubling and inverting in miniature
dc-dc applications. Few are aware, however, that most charge pumps can
halve as well as double or invert an input voltage. The increasing
adoption of low-voltage logic makes this χ2.....(design idea) |
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Charge pump converts 5V to 5V - 01/20/05 EDN-Design
Ideas:.....(design idea) |
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Charge Pump Converts Volt in to± Volt Out - 09/02/99 EDN-Design
Ideas: /A charge-pump IC's ability to produce both VIN and -VIN outputs
allows circuit in Figure 1 to generate separate positive and negative
outputs from a single input voltage, regardless of input-voltage
polarity. For example, circuit allows an RS-232C interface to generate
a dual supply for low-power data-acquisition systems.....(design idea) |
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Charge Pump Doubles Negative Voltage - Maxim App Note #782 (app note) |
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Charge Pump Efficiently Divides Supply Voltage - This circuit uses
a few FETs and logic devices to down convert a DC voltage to about one
half its value
.(designed by David A. Johnson) |
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Charge Pump Generates Positive Bias - 03/02/95 EDN-Design Ideas:
(design idea) |
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Charge Pump Voltage Quadrupler - Simple circuit that will quadruple
an input voltage. Useful for bias supplies and programming voltages.
(circuit design) |
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Choosing the Right Power Supply IC for Your Application - Maxim
Application Note #737 (app note) |
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Circuit Provides +5 Volt Gate Bias From 48 Volt Input - Maxim
Application Note #1803 (app note) |
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Circuit Provides 5V Gate Bias From48V - 09/19/02 EDN-Design Ideas: A
small and simple circuit derives 5V from the -48V rail that telecomm
applications typically use (Figure 1). Useful for gate bias and other
purposes, the 5V supply delivers as much as 5-mA output current. A shunt
reference.....(design idea) |
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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 CMOS INVERTER 125KHz LC OSCILLATOR 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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Compact Inductorless Boost Circuit Regulates White LED Bias Current
- Maxim Application Note #1116 (app note) |
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Controlling a Variable Voltage Power Supply using the DS1809 Pushbutton
Control - Maxim Application Note #1035 (app note) |
