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A Wien bridge oscillator is a type of electronic oscillator that generates sine waves. It can generate a large range of frequencies . The oscillator is based on a bridge circuit originally developed by Max Wien in 1891 for the measurement of impedances . [ 1 ]
The HP 200A, first built in 1938, was the first product [1] made by Hewlett-Packard and was manufactured in David Packard's garage in Palo Alto, California. It was a low-distortion audio oscillator used for testing sound equipment. It used the Wien bridge oscillator circuit, that had been the subject of Bill Hewlett's masters thesis.
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The Wien bridge is a type of bridge circuit that was developed by Max Wien in 1891. [1] The bridge consists of four resistors and two capacitors . At the time of the Wien bridge's invention, bridge circuits were a common way of measuring component values by comparing them to known values.
the link to the other schematic, supposedly in spanish, is broken. —Preceding unsigned comment added by 172.213.91.54 20:16, 14 April 2008 (UTC) []. An oscillation circuit in which a balanced bridge is used as a feedback network is the Wien bridge oscillator shows in fig. —Preceding unsigned comment added by 117.98.64.51 18:18, 11 May 2009 (UTC) []
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The Wien Bridge is often used in audio signal generators because it can be easily tuned using a two-section variable capacitor or a two section variable potentiometer (which is more easily obtained than a variable capacitor suitable for generation at low frequencies). The archetypical HP200A audio oscillator is a Wien Bridge oscillator.
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