Coupled single-electron transistors as a differential voltage amplifier

Details Coupled single-electron transistors as a differential voltage amplifier Coupled single-electron transistors as a differential voltage amplifier

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006njph....8..300w&link_type=abstract

New Journal of Physics, Volume 8, Issue 12, pp. 300 (2006).

Physics

1

Scientific paper

We have investigated a possible application of single-electron transistor (SET) devices for use as a differential voltage amplifier. The device consists of a box-SET and probe-SET coupled with each other through a tunnel junction, with the gate electrodes of the two SETs acting as differential signal inputs. The voltage across the probe-SET at a fixed bias current provides information about the charge states of both the probe-SET and the box-SET, which was confirmed by simulations based on the orthodox theory of single-electron tunnelling. When operated as a differential amplifier, the output probe-SET voltage signal was measured as a function of the two gate input signals. While the output signal was found to be proportional to the difference in the two input signals, it remained unchanged for input signals of the same amplitude (referred to as the common mode signal), and the common-mode rejection ratio was found to be 27.5 dB.

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