Download e-book for kindle: Analog Filters in Nanometer CMOS by Heimo Uhrmann

By Heimo Uhrmann

ISBN-10: 3642380123

ISBN-13: 9783642380129

ISBN-10: 3642380131

ISBN-13: 9783642380136

Starting from the fundamentals of analog filters and the terrible transistor features in nanometer CMOS 10 high-performance analog filters constructed through the authors in a hundred and twenty nm and sixty five nm CMOS are defined largely. between them are gm-C filters, current-mode filters, and lively filters for system-on-chip awareness for Bluetooth, WCDMA, UWB, DVB-H, and LTE functions. For the lively filters numerous operational amplifier designs are defined. The booklet, in addition, encompasses a overview of the most recent kingdom of study on low-voltage low-power analog filters. to hide the subject of the booklet comprehensively, linearization concerns and dimension tools for the characterization of complex analog filters are brought furthermore. various tricky illustrations advertise a simple comprehension. This ebook should be of price to engineers and researchers in in addition to scientists and Ph.D scholars at universities. The booklet can be recommendable to graduate scholars specializing on nanoelectronics, microelectronics or circuit engineering.

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1 Linearization Techniques for OTAs 29 Fig. 1 V). 4). The linearity of the transconductor can be improved by adding source resistors (see Fig. 3). 1 V) and so the resulting degeneration factor N is 5. 02 dB for an input signal of 200 mV. In Fig. 4 a pseudodifferential self-regulated OTA based on transistors operation in triode region is shown which was introduced by [16]. The transistors M1 and M2 operate in triode region, the transistors M3 and M4 form with the opamps a regulated gain control and they are used to fix the drain voltage of M1 and M2.

But it should be noticed that in this design two differential amplifiers with a very good high frequency performance are necessary. All the here presented linearization techniques are not sufficient to apply these OTAs to a Gm -C filter. At first it should be noticed that the output stage of the OTA produces also some distortions. Secondly, a Gm -C filter consists of several OTAs which means that the distortions increase with the number of OTAs. 16) where n is the number of OTAs. When a Gm -C filter consists of 4 OTAs, the HD3 of the filter is 12 dB worse than the HD3 of one OTA.

1 Linearization Techniques for OTAs 29 Fig. 1 V). 4). The linearity of the transconductor can be improved by adding source resistors (see Fig. 3). 1 V) and so the resulting degeneration factor N is 5. 02 dB for an input signal of 200 mV. In Fig. 4 a pseudodifferential self-regulated OTA based on transistors operation in triode region is shown which was introduced by [16]. The transistors M1 and M2 operate in triode region, the transistors M3 and M4 form with the opamps a regulated gain control and they are used to fix the drain voltage of M1 and M2.

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Analog Filters in Nanometer CMOS by Heimo Uhrmann


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