• journal/journal.article
• aip/rsi
• /content/aip/journal/rsi/84/5/10.1063/1.4804650
• rsi.aip.org
1887
No data available.
No metrics data to plot.
The attempt to plot a graph for these metrics has failed.
Measurement of ultra-low power oscillators using adaptive drift cancellation with applications to nano-magnetic spin torque oscillators
USD
10.1063/1.4804650
View Affiliations Hide Affiliations
Affiliations:
1 Electrical and Computer Engineering Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
2 Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
a) Present address: National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki, 305-8568, Japan. Electronic mail: shingo.tamaru@aist.go.jp
Rev. Sci. Instrum. 84, 054704 (2013)
/content/aip/journal/rsi/84/5/10.1063/1.4804650
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/5/10.1063/1.4804650
View: Figures

## Figures

FIG. 1.

Block diagram of the standard STO characterization apparatus considered in this work.

FIG. 2.

VSD of the SC output, , for different VBWs. The plot was produced through a numerical experiment, by generating random values for the real and imaginary parts of the SA input and applying the corresponding RBW and VBW filtering, rectifying by an envelope detector and squaring the signal to produce the final normalized VSD plot. The frequency and are normalized by . The VSD plots are normalized by the intersection point of the VSD plot for / = ∞ with the axis.

FIG. 3.

(a) RMS of the difference between the th and 50th PSDs measured by the old SA (Advantest R3271A). These RMS plots are normalized by the total gain to be referred to the input. The sweep parameters are given in the text. The SA performs 5 sequences of PSD measurements, centered at 4, 9, 14, 19, and 24 GHz, as shown by the sequence number on the plot. The arrow in sweep sequence 1 shows that the entire 50 PSD measurements for sweep sequence 1 are completed before sweep sequence 2 begins. The 50th PSD is used as the base line noise subtracted from the th PSD (1 ⩽ ⩽ 49), thus 49 lines are plotted in the figure. (b) blue line is the RMS of the difference between 49th and 50th PSDs, and the red line is the STD of the input referred PSD calculated from . Note that σ corresponds to the interval of 1 between two sweeps in (a).

FIG. 4.

(a) RMS of the difference between the th and 50th PSDs measured by the modern SA (Agilent E4440A). These RMS plots are normalized by the total gain to be referred to the input. The sweep parameters are given in the text. (b) blue line is the RMS of the difference between 49th and 50th PSDs, and the red line is the STD of the input referred PSD calculated from . Note that σ corresponds to the interval of 1 between two sweeps in (a).

FIG. 5.

(a) Block diagram of the STO characterization apparatus with the adaptive drift cancellation technique. (b) STD of the th sweep obtained by this technique. The sweep parameters are given in the text. (c) blue line is the STD of the 50th sweeps obtained by this technique, red line is the STD of the input referred PSD calculated from , and black line is the RMS of the difference between 49th and 50th PSDs obtained by the standard baseline noise subtraction algorithm with the same SA (blue line in Fig. ).

FIG. 6.

Comparison of the STO signal obtained by the three different configurations. From top to bottom, the blue, red and black lines are obtained by the standard baseline subtraction technique with an old SA, the same technique but with a modern SA and by the adaptive drift cancellation technique with the old SA introduced in this work, respectively.

/content/aip/journal/rsi/84/5/10.1063/1.4804650
2013-05-15
2014-04-17

Article
content/aip/journal/rsi
Journal
5
3

### Most cited this month

More Less
This is a required field