التفاصيل البيبلوغرافية
| العنوان: |
Baseband and Audio Mixed-Signal Front-End IC for GSMIEDGE Applications. |
| المؤلفون: |
Baggini, Barbara, Basedau, Philipp, Becker, Rolf, Bode, Peter, Burdenski, Ralf, Esfahani, Farzad, Groeneweg, Willem, Helfenstein, Markus, Lampe, Alexander, Ryter, Roland, Stephan, Ralph |
| المصدر: |
IEEE Journal of Solid-State Circuits; Jun2006, Vol. 41 Issue 6, p1364-1379, 16p, 11 Black and White Photographs, 11 Diagrams, 5 Charts, 9 Graphs |
| مصطلحات موضوعية: |
COMPLEMENTARY metal oxide semiconductors, INTEGRATED circuits, ELECTRONIC modulators, ELECTRIC potential, LOGIC circuits, ELECTRONIC circuits |
| مستخلص: |
A complete mixed-signal front-end CMOS chip is presented, supporting GSM/EDGE as well as enhanced audio applications. The chosen solution for the transmit section is based on Laurent's approximation of the nonlinear GMSK modulator. This enables burst shaping in the I/Q domain thereby solving the problem of power ramping. Also, up to GPRS class 12 is supported. The receive section on the other hand consists of a low power dual mode continuous-time ΣΔ ADC for I and Q, supporting ZIF and LIF modes of operation and achieving typically 12.5 bit of resolution under production conditions. An on-chip PLL, which supplies all blocks with various clock frequencies, additionally supports clock jitter suppression. The audio section comprises a codec supporting standard formats such as IIS and PCM. It features mono/stereo signaling from various sources in 16 bit quality as well as high-drive buffers for 4 Ω single-ended loads (capacitively coupled). The whole chip is powered from a 1.5/2.65 V supply voltage and consumes 22 mW in paging mode. [ABSTRACT FROM AUTHOR] |
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