Title :
The noise figure of a sampling mixer: theory and measurement
Author :
Eriksson, Patrik ; Tenhunen, Hannu
Author_Institution :
Electron. Syst. Design Lab., R. Inst. of Technol., Stockholm, Sweden
Abstract :
The concept of noise figure as applied to a sampling mixer, based on a track and hold circuit, has been investigated for a case where the mixer is resistively terminated at its input. A noise model accounting for the sampled thermal noise and the time continuous noise of the hold amplifier is developed. Measurements are made on a sampling mixer implemented in a 0.6 μm CMOS process to verify the model. The model and the measurements are found to show good correspondence. A significant conclusion is that the noise of the hold amplifier may give a significant noise contribution and prevent the lowering of the mixer noise figure expected from a higher sampling frequency
Keywords :
CMOS analogue integrated circuits; integrated circuit measurement; integrated circuit noise; mixers (circuits); nonlinear network analysis; sample and hold circuits; signal sampling; thermal noise; 0.6 micron; CMOS process; hold amplifier; noise figure; noise model; resistively terminated input; sampled thermal noise; sampling frequency; sampling mixer; time continuous noise; track/hold circuit; CMOS technology; Circuit noise; Noise figure; Noise measurement; Phase noise; Sampling methods; Semiconductor device modeling; Switches; Thermal resistance; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.813259
