Conclusion Jwt
A 2.7 V radio transceiver for 900 1900 MHz was realized in a 50 GHz fT silicon germanium technology. The single chip transceiver contains the RX mixers, TX mixers, quadrature generator, amplifiers, quadrature phase shifters, the VCO and the 64 65 prescaler. Most of the circuits were realized in a 20 GHz bipolar technology before. In the 50GHz SiGe technology the noise figure was improved with 2dB and the additional bandwidth allows for true dual mode operation with identical gain curves for...
Ecole Polytechnique Lausanne Diploma Thesis Brenna
1 T. Lee, The Design of CMOS Radio-Frequency Integrated Circuits, Chapter 10, Cambridge University Press, 1998. 2 R. Jindal, Distributed Substrate Resistance Noise in Fine-Line NMOS Field-Effect Transistors, IEEE Trans, on Electron Devices, vol. ED-32, no. 11, Nov. 1985, pp. 2450-2453. 3 D. Shaeffer and T. Lee, A 1.5V, 1.5GHz CMOS Low Noise Amplifier, IEEE J. Solid-State Circuits, vol. 32, no. 5, May, 1997, pp. 745-759. 4 G. Brenna, LNA Research, Diploma Thesis, cole Polytechnique F d rale de...
Dynamic Translinear Circuits
Wouter A. Serdijn, Jan Mulder, Paul Poort, Michiel Kouwenhoven, Arie van Staveren and Arthur H.M. van Roermund Delft University of Technology, Faculty of Information Technology and Systems DIMES Electronics Research Laboratory Mekelweg 4, 2628 CD Delft, The Netherlands phone 31-15-2781715, fax 31-15-2785922, e-mail W.A.Serdijn its.tudelft.nl A promising new approach to shorten the design trajectory of analog integrated circuits without giving up functionality is formed by the class of dynamic...
References Old
1 J. Crols and M. Steyaert, Low-IF Topologies for High Performance Analog Front-Ends of Fully Integrated Receivers, accepted for publication in IEEE Trans, on Circuits and Systems II, 1997 2 J.C.Rudell et al., A 1.9 GHz Wide-Band IF Double Conversion CMOS Receiver for Cordless Telephone Applications, in IEEE J. Solid-State Circuits, vol.32, no. 12, pp.2071-2088, December 1997. 3 J. Crols and M. Steyaert, A 1.5 GHz highly linear CMOS downconversion mixer, in IEEE J. Solid-State Circuits,...
The Quadrature Generator
The quadrature generator is expected to deliver both LO signals with a 90 phase difference accurate to within 1 phase error. This is possible using just an RC and a CR filter to obtain the 45 and -45 phase relation. The phase accuracy is well covered but technology variations are the cause of an important variation of gain. To obtain the necessary gain matching of the I and the Q channel, limiting amplifiers, realized as double differential pairs to obtain a horizontal cascode operation, are...
The Transmitter Topology
The transmitter is basically a zero IF single side band mixer followed by a pre-power amplifier PPA To use the available 2.7 V supply range efficiently, the base band I and Q balanced inputs were realized in current mode. So the only voltage swing on the mixers inputs are the local oscillator LO signals delivered by the quadrature generator QG with 45 45 phase relation. The modulated collector currents of the I and Q mixer enter a resistive summing node to feed a voltage mode RF signal to the...
Substrate Bounce in MixedMode CMOS ICs
Philips Research Laboratories, Eindhoven, The Netherlands. Now with University of Twente, Enschede, The Netherlands Substrate noise is one of the key problems in mixed analog digital ICs. Although measures are known to reduce substrate noise, the noise will never be completely eliminated since this requires larger chip area and thus higher cost. Analog circuits on digital ICs simply have to be resistant to substrate noise. A general strategy is given which can be summarized as the supply of the...