Is the operating Q point of a transistor amplifier fixed?
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| At millikelvin temperatures, position resolution a factor of 4.3 above the quantum limit is achieved and demonstrates the near-ideal performance of the single-electron transistor as a linear amplifier. | |
| The instability of the amplifier can be mitigated by tuning the base bias voltage of the shunt transistor pair. | |
01 Aug 1999 6 Citations | It is also found that the maximum allowed deviation in amplifier gain due to on-wafer process parameter derivations when high Q-values and a stable filter gain are required is very small, even if an automatic Q-controlling system is included. |
| The results of this study indicate that even within the relatively narrow low-qψ operating space, there is a continuum in the characteristics of the low-q^ disruptions with a primary dependence on the value of βt. | |
13 Citations | Experimental results show that such a class of amplifiers that use only one transistor provides a higher transmission gain and a smaller noise figure than a conventional single-stage amplifier, making it interesting to operate at millimeter-wave frequencies. |
| In the paper, a new bandpass amplifier has been proposed which can achieve the required Q without an additional Q-enhancement circuit. | |
30 Apr 2006 27 Citations | Experiments on a transistor level amplifier circuit confirms that the approach is accurate in terms of statistical attributes and most deviations in layout and process level parameters can be correctly diagnosed. |
21 Oct 2001 10 Citations | The gain-per-stage of the amplifier is amongst the highest reported in any transistor technology in this frequency band. |
| This has facilitated a wider range of resistances in the measurement circuit around the transistor than is possible when using a voltage amplifier for the same kind of measurements. |
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