Title :
A track&hold-mixer for direct-conversion by subsampling
Author :
Vasseaux, T. ; Huyart, B. ; Loumeau, P. ; Naviner, J.E.
Author_Institution :
Ecole Nat. Superieure des Telecommun., Paris, France
Abstract :
The growing need for dense wireless communication circuits in the frequency range of 900 MHz, has forced IC designers to find alternative receivers to the superheterodyne architecture. Among these alternatives, the direct-conversion by subsampling system should be promising because it offers a high level of integration. However, due to sampling noise and aperture jitter, this architecture is certainly restricted to applications which do not need high performance. In this paper the design of a track&hold suitable for the front-end of a “subsampling receiver” is proposed. This circuit can track a signal as high as 900 MHz with a sampling frequency of 25 MHz. To gain both in consumption and performance, the analog part of the circuit works with a 3.3 V supply voltage but the digital part (the clock generator) works with 5 V
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF mixers; integrated circuit noise; jitter; mixed analogue-digital integrated circuits; radio receivers; signal sampling; 25 MHz; 3.3 V; 5 V; 900 MHz; aperture jitter; clock generator; dense wireless communication circuits; direct-conversion; noise sampling; sampling noise; subsampling receiver; track/hold-mixer; Apertures; Band pass filters; Bandwidth; Circuit noise; Integrated circuit noise; Jitter; RF signals; Radio frequency; Sampling methods; Wireless communication;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780072
