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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.....(design idea added 08/05) |
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10 Khz VFC uses Charge Pump Variation - 04/09/98 EDN-Design Ideas: (design idea
added 6/06) |
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100ma UltraLow Noise Charge Pump LED Supply with Output Current Adjust - Linear
Technology LTC3201 (app note added 6/06) |
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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.
.(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 of.....(design idea added 09/05) |
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AN152 Using the CS5521/22/23/24/28 & CS5525/26 Charge Pump Drive for External Loads
- (app note added 6/07) |
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AN-347: Shielding & Guarding - AN-347 Analog Devices Application Note (app
note added 2/06) |
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AN-348: Avoiding Passive-Component Pitfalls - AN-348 Analog Devices Application
Note (app note added 2/06) 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
(app note added 09/08) 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 added 2/06) |
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AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale Package -
AN-772 Analog Devices Application Note (app note added 2/06) |
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AN813: Applying the TC1219/TC1220 Inverting Charge Pumps with Small External Capacitor
Values - Microchip Application Note Published 20-Sep-04 (app note added
06/06/06) |
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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 added 2/06) 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.....(app note added 5/08)
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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......(design idea added 6/06) |
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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 (app note added 5/08) |
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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.....(design idea added 1/05) |
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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 (app note added 5/08) |
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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 added 5/03) |
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Charge pump converts 5V to 5V - 01/20/05 EDN-Design Ideas:.....(design idea added
5/05) |
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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 added 11/05) |
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Charge Pump Doubles Negative Voltage - Maxim App Note #782 (app note added 5/08) |
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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
added 11/05) |
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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 added
10/06) |
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Choosing the Right Power Supply IC for Your Application - Maxim Application Note
#737 (app note added 5/08) |
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Circuit Provides +5 Volt Gate Bias From 48 Volt Input - Maxim Application
Note #1803 (app note added 5/08) |
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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 added 1/05) |
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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 added 5/08) |
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Controlling a Variable Voltage Power Supply using the DS1809 Pushbutton Control -
Maxim Application Note #1035 (app note added 5/08) |
