New PDF release: Charge-based CMOS Digital RF Transmitters

By Pedro Emiliano Paro Filho, Jan Craninckx, Piet Wambacq, Mark Ingels

ISBN-10: 3319457861

ISBN-13: 9783319457864

ISBN-10: 331945787X

ISBN-13: 9783319457871

This ebook introduces a totally novel structure that could chill out the trade-off current at the present time among noise, strength and sector intake in a really appropriate answer for complex instant communique structures. in the course of the blend of charge-domain operation with incremental signaling, this structure supplies the easiest of either worlds, offering the diminished zone and excessive portability of digital-intensive architectures with a stronger out-of-band noise functionality given via intrinsic noise filtering features. Readers may be enabled to layout better functionality radio front-ends that devour much less strength and region, in particular with appreciate to the transmitter and gear amplifier designs, thought of by means of many the “battery killers” on so much cellular devices.

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Extra info for Charge-based CMOS Digital RF Transmitters

Sample text

Upconverted baseband noise has a very significant impact in the outof-band noise, reason why large and bulky reconstruction filters are typically placed after DAC conversion, not only to reduce the sampling aliases, but also to filter out the multiple noise contributors, including quantization noise (Fig. 7). In [Gia11], large flexibility is achieved using a Tow-Thomas filter implementation that offers independent programming of transimpedance gain, bandwidth and quality factor. In [Cas09], an active inductor providing a second-order low-pass biquadratic transfer function is used to improve noise filtering, not without an impact in power consumption.

However, non-idealities of the several blocks comprising the signal path contribute to create different intermodulation products that end up outside the transmit band. These spurious emissions are seen as interference to the adjacent channels, and degrade their link quality. Thus, one way of assessing the TX linearity is by concurrently measuring the amount of power transmitted both in-band and at the adjacent channels (Fig. 1). The ratio between these two quantities defines the ACLR [Raz12]. Second, every communication standard defines a spectral mask (Fig.

This feature is further explored in Sect. 2. Second, feeding the watermill through a reservoir provides intrinsic filtering capabilities to the structure. g. ) will have a direct impact on the output water flow, the application of a water reservoir provides an intrinsic buffering effect where all sorts of disturbances and fluctuations (“noise”) are naturally averaged and therefore attenuated by the structure. In fact, the larger the reservoir the more damping is provided, further attenuating fluctuations in the observed water flow.

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Charge-based CMOS Digital RF Transmitters by Pedro Emiliano Paro Filho, Jan Craninckx, Piet Wambacq, Mark Ingels

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