Transversal noise current in split-drain transistors

Castaldo, F.; Filho, C.A.R.

doi:10.1109/iscas.2006.1693798

Cited by 1 publication

(2 citation statements)

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“…To do so, a setup using two instrumental amplifiers whose gain is adjusted to 1900 (65,6dB) each one is used in conjunction with a two-channel signal analyzer HP3562A featuring cross-correlation algorithm, as shown in Figure 10(a). The cross-correlation technique eliminates the instrumental amplifier noise [10], [11] and gives the differential noise voltage spectral density (√VPSD) whose value can be converted to current taking into account the 47kΩ I-V converter resistors. This procedure allows evaluating the measured differential noise current.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

“…This observation was already mentioned in the literature [9], which includes thermal and 1/f noises. A new noise model was therefore developed aimed to explain this excess-noise current in thermal region [10]. The proposed noise model for the split-drain transistor is represented by noise current spectral densities equivalent sources, as indicated in Figure 4.…”

Section: Noise Analysismentioning

confidence: 99%

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Magnetically-coupled Current Sensor Using An Integrated Coil And A Cmos Split-drain Transistor

Castaldo¹,

Filho²

2006

Eletrônica de Potência

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An integrated current sensing circuit intended for Smart-Power and embedded applications featuring galvanic isolation is implemented. It is based on magnetic detection using the CMOS compatible Split-Drain transistor (MAGFET) that provides a very linear output current versus magnetic field. The current to be sensed flows through an integrated coil placed atop the split-drain transistor and produces a relatively strong magnetic coupling enough to cause a detectable transistor unbalance current. An integrated sensor built in 0.35µm CMOS technology presented an output conversion factor of 1500nA/A and a minimum detectable magnetic field around 1µT within 1Hz bandwidth in thermal range for 100µA transistor bias current.

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

Section: Noise Analysismentioning

confidence: 99%