Month: April 2009

Current Sense Circuit, A Classic Design Using Positive Rail Sensing

A LT1637 is advertised as 1.1MHz, 0.4V/us Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp. This features are suitable for current sensing application since input voltages are right at the upper rail. The circuit show current sensing of 5V supply system, but  monitoring up to 44V application can be done by this circuit  (the maximum supply voltage of the op-amp). […]

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Category: Control and Monitoring, Power Supply, Testing and Measurement Tags:

Wien-Bridge Oscillator Using Incandescent lamp Stabilizer

Incandescent lamp has been used to reduce harmonic distortion in sine oscillator circuit. The nonlinear resistance characteristic of the lamp filament help the circuit to shape the signal to approximate the ideal sine wave. Here is the classic Wien-bridge oscillator circuit using the incandescent lamp: You can change the frequency of the oscillator by modifying the R1 (and R2), or […]

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Category: Audio, Basic Function Circuits Tags:
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