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1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT: Linear Technology LT3465 (Circuit / schematic
design added 6/06) |
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1KHz
Sine Wave Generator: (Circuit added 9/04) |
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AB-111: Single-Supply Wien Bridge Oscillator: AB-111 - Analog Devices Application Notes (Circuit / schematic design
added 6/06) Wien Bridge Oscillators require only one op amp, important in battery-operation. This circuit operates from a single 9V battery. |
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AB-112: Single Resistor Controls Wien Bridge Oscillator Frequency: AB-112 - Analog Devices Application Notes (Circuit
/ schematic design added 6/06) Frequency control can be added to the conventional Wien Bridge Circuit by adding an op amp inverter. |
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Audio
Test Oscillator: (Electronic Schematic / circuit added 4/02) |
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Few Extra Components Stabilize Oscillator: 02/15/96 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) The circuit
beneath the dashed line in Figure 1 is the well-known Wien-bridge oscillator. The lamp is a common tungsten incandescent bulb. Its resistance forms a substantial part of the gain-setting
network. For the oscillator to function properly, the increase in lamp resistance accruing from the ac signal must bring the open-loop gain to unity while the op amp is still in its linear
range. At that point, RA=2(RB+RLAMP), and the output is a low-distortion sinusoid. It's difficult to achieve stable operation at high frequencies, because the output decays rapidly if the
open-loop gain falls below unity. The lamp does not have enough time to respond, and "squegging" develops.... |
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Generating Phase Controlled Sinewaves with the ML2036 / AN-42000: Fairchild Application Notes / (Circuit / schematic design
added 6/06) |
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Programmable Oscillator uses digital potentiometers: 03/07/02 EDN Design Ideas / (added 1/05) Digital potentiometers are versatile devices; you can use them in many
filtering and waveform-generation applications. This Design Idea describes an oscillator in which setting the resistance of two digital potentiometers independently programs the oscillation
amplitude and frequency. Figure 1 shows a typical diode-stabilized Wien-bridge oscillator that generates accurate sine waves fro... ... |
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Sine Wave Generator: (Electronic Schematic / circuit added 4/02) |
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Single Resistor Controls Wien Bridge Oscillator Frequency: AB-112 - Analog Devices Application Notes (Circuit /
schematic design added 6/06) Frequency control can be added to the conventional Wien Bridge Circuit by adding an op amp inverter. |
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Single-Supply Wien Bridge Oscillator: AB-111 - Analog Devices Application Notes (Circuit / schematic design added
6/06) Wien Bridge Oscillators require only one op amp, important in battery-operation. This circuit operates from a single 9V battery. |
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The
Wien bridge Oscillator is reborn: 06/13/02 EDN Design Ideas / (added 1/05) In 1940, William Hewlett and David Packard launched a product from a garage. The product
was a Wien-bridge oscillator. It consisted of a single-pole highpass filter in series with a single-pole lowpass filter. To keep the gain constant, the circuit used an incandescent pilot light
to provide AGC (automatic gain control).... |
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Wien
Bridge Oscillator: (circuit / schematic added 2/03) |
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Wien Bridge Oscillator #2: This circuit produces an extremely low distortion sine-wave, in spite of the non-linear devices
used for amplitude limiting (D1 and D2). The reason is first that distortion (harmonics) are fed to the minus input of the opamp with far less loss than to the plus input, severely attenuating
them. Second, a Wien bridge oscillator requires a gain of exactly 3.00. No more and no less. For lowest distortion, calculate the minimum and maximum available gain to just above and just
below 3.00. In other words, use as little amplitude control as possible. Designed by
Andrew R. Morris
(added 09/05) |
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Wien Bridge
Oscillator (Rail-to-Rail) Sine Wave Generator : Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc. (Circuit / schematic design added 6/06) |
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Wien
Bridge Oscillator is Reborn: 06/13/02 EDN-Design Ideas / (Electronic Circuit diagram added 03/03) In1940, William Hewlett and David Packard launched a product from a garage. product
was a Wien-bridge oscillator. It consisted of a single-pole highpass filter in series with a single-pole lowpass filter. |
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Wien Bridge Oscillator keeps THD BeLow One PPM: 11/10/94 EDN-Design Ideas / (added 01/04) The Wien-bridge
sine-wave oscillator uses a light bulb to stabilize its amplitude. The circuit doesn't have a light bulb; it sports several enhancements that lower its distortion and generate a test signal
pure enough for testing modern op amps and high-resolution A/D converters.... |
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Wien Bridge
Oscillator-42003.0: Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc. (Circuit / schematic design added 6/06) |
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Wien-bridge
Theremin: This circuit is a basic theremin with only a pitch control. It uses the "heterodyne" technique, as did Theremin's original instrument. Heterodyning is advantageous in its
simplicity, and is made further attractive in this design by eliminating the coils that are usually hard to find. Although this is a simple theremin without optimized sensitivity and noise
characteristics, it is a viable performance instrument. |