- Conference date: 10-17 August 2005
- Location: Orlando, Florida (USA)
A microcontroller based multiple sine wave generator has been designed and built using off‐the‐shelf integrated circuits. The frequency, being the same for all waves, is set to an arbitrary value with a single digital command within the range of 5 Hz to 2 kHz. The main purpose was to generate three sinusoidal waves of same frequency with two quadratic waves, a sine and a cosine, and a third with a controllable phase with respect to the quadratic pair. The third wave, which can be used as an excitation, has a controllable magnitude, as well. Thus, the excitation has its three defining parameters independently controlled and set digitally, i.e. amplitude (8 bit, 10 V peak), frequency (12 bit), and phase (12 bit resolution, ± 180°). The quad waves have amplitudes of 1 V peak and are used as two references for analysis of the response of a magnetic susceptibility bridge into in‐phase and out‐of‐phase components.
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