Analog Filters in Nanometer CMOS (Springer Series in by Heimo Uhrmann, Robert Kolm, Horst Zimmermann

By Heimo Uhrmann, Robert Kolm, Horst Zimmermann

Ranging from the fundamentals of analog filters and the terrible transistor features in nanometer CMOS 10 high-performance analog filters built via the authors in a hundred and twenty nm and sixty five nm CMOS are defined greatly. between them are gm-C filters, current-mode filters, and lively filters for system-on-chip recognition for Bluetooth, WCDMA, UWB, DVB-H, and LTE purposes. For the lively filters a number of operational amplifier designs are defined. The publication, moreover, encompasses a overview of the latest nation of analysis on low-voltage low-power analog filters. to hide the subject of the e-book comprehensively, linearization matters and dimension tools for the characterization of complicated analog filters are brought additionally. a number of difficult illustrations advertise a simple comprehension. This booklet should be of price to engineers and researchers in in addition to scientists and Ph.D scholars at universities. The ebook is usually recommendable to graduate scholars specializing on nanoelectronics, microelectronics or circuit engineering.

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Extra resources for Analog Filters in Nanometer CMOS (Springer Series in Advanced Microelectronics)

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The minimum signal level is determined by the noise of the circuit, the maximum level by distortion. 1) where vs,n % THD is the magnitude of the signal when its THD reaches n %. Mostly in the literature for the calculation of the dynamic range, a THD of 1 % is assumed. Generally, in analog circuits the absolute limit of power comes from the need to maintain the energy of the signal much larger than the thermal energy to achieve a required signal-to-noise ratio. This condition can be expressed from [134] as a minimum power per pole Pmin = 8 · fC · kB · T · SNR, where fC is the signal frequency, kB denotes Boltzmann’s constant, T is the absolute temperature and SNR is the signal-to-noise ratio.

2 µm CMOS process is described. 5 V and has a DR of 67 dB. 1 summarizes the state-of-the-art. 3 State-of-the-Art 45 46 5 Gm -C Filters Fig. 4 Requirements for the Implemented Gm -C Filters and Applications in Ultra-Wideband Ultra-wideband (UWB) is a communication technology which can be used for shortrange high-bandwidth communications. It allows data rates up to 480 Mb/s in the frequency spectrum of 3 to 10 GHz. It utilizes a large portion of the radio spectrum in a way that it does not interfere with other more traditional narrow band uses.

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 summarizes the distortions of the presented OTAs and gives an estimation for the distortions, when these OTAs are applied to a Gm -C filter which consists of 4 OTAs.

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