Download e-book for iPad: Analog Circuit Design: RF Circuits: Wide band, Front-Ends, by Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing

By Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing

ISBN-10: 9048169909

ISBN-13: 9789048169900

Analog Circuit layout is an important reference resource for analog circuit designers and researchers wishing to maintain abreast with the most recent improvement within the box. the academic insurance additionally makes it compatible to be used in a sophisticated layout path.

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Extra info for Analog Circuit Design: RF Circuits: Wide band, Front-Ends, DAC's, Design Methodology and Verification for RF and Mixed-Signal Systems, Low Power and Low Voltage

Sample text

The directly frequency modulated oscillator control can be analog or digital [5]. In order to take optimal benefit from the experience gained by a first generation Bluetooth radio, predecessor of the presented chip, and in order to have a fast time to market, the existing direct IQ up-conversion transmitter topology has been used as a starting point [1]. 0 standard, called “ Enhanced Data Rate”, which uses non-constant envelope modulation. In the direct oscillator modulation topology 32 this requires amplitude modulation in the power amplifier, increasing the complexity and the risk significantly.

At low frequencies the output resistance can be designed to be high enough. The problem starts if the non-linear current that charges and discharges the parasitic capacitances starts to grow relatively big compared to the load current. We identified two mechanisms that generate these non-linear currents. They are described in the two sections below. For ease of calculations we assumed that the DAC’s are unary-decoded. 1. The maximum output impedance The output resistance can be made sufficiently high.

2) provide the means to completely switch off the supply of a circuit not in use, to eliminate the leakage current. All voltage regulators, including the one that powers the base-band logic, are controlled by a power management circuit. The latter is implemented in 2V5 dual gate oxide logic, which exhibits a minimum remaining leakage current. 2. Top level implementation highlights: crosstalk Managing cross-talk between different circuit building blocks is one of the main challenges in developing a fully integrated transceiver and even more in developing a single-chip base-band plus transceiver component.

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Analog Circuit Design: RF Circuits: Wide band, Front-Ends, DAC's, Design Methodology and Verification for RF and Mixed-Signal Systems, Low Power and Low Voltage by Michiel Steyaert, Arthur H.M. van Roermund, Johan Huijsing


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