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A logarithmic converter employing the proposed temperature compensating method based on a master–slave control is presented. With the help of a raised master–slave circuit, the proportional to absolute temperature (PTAT) coefficient of the logarithmic converter is compensated by that of the PTAT current in the bandgap reference, which makes the CMOS implementation of the logarithmic converter employing no external component possible. The logarithmic converter provides a 45 dB linear range with < 3 dB error as the temperature varies from 0 to 90°C.
References
-
-
1)
-
2. Wilson, B., Al-Gahtani, M.: ‘Improved logarithmic converter based on a transconductance feedback amplifier’, ISCAS. Circuits Syst., 2001, 1, (1), pp. 651–654, .
-
2)
-
1. Koli, K., Halonen, K.: ‘A 2.5 V temperature compensated CMOS logarithmic amplifier’. Custom Integrated Circuits Conf., Santa Clara, CA, USA, May 1997, pp. 79–82, .
-
3)
-
4. Kwon, K., Nam, I.: ‘A linearization technique for a transconductor using vertical bipolar junction transistors in a CMOS process’, IEEE Trans. Microw. Theory Tech., 2013, 61, (1), pp. 195–203 (doi: 10.1109/TMTT.2012.2226602).
-
4)
-
J. Lee ,
I. Nam ,
S. Cho ,
K. Lee
.
A highly linear and low noise 2.4 GHz RF front-end circuits using transformer and vertical NPN BJT.
Electron. Lett.
,
2 ,
103 -
105
-
5)
-
5. Bai, C.F., Wu, J.H.: ‘A novel temperature compensating method of logarithmic amplifier in RSSI’. Mediterranean Electrotechnical Conf., Beirut, April 2014, pp. 271–275, .
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2014.2371
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