A CMOS quad-band-ΣΔ-transceiver for GSM-EDGE with dual mode transmitter architecture for low noise and high linearity

Autor:	B. Neurauter, G. Marzinger, Robert Weigel, M. Simon
Rok vydání:	2004
Předmět:	Engineering business.industry Transmitter Electrical engineering Handset law.invention Amplitude modulation Direct-conversion receiver Voltage-controlled oscillator law Modulation Electronic engineering Enhanced Data Rates for GSM Evolution Transceiver business
Zdroj:	2004 IEE Radio Frequency Integrated Circuits (RFIC) Systems. Digest of Papers.
Popis:	A 120 nm CMOS quad-band transceiver for GSM EDGE with a dual mode transmitter architecture and a constant gain direct conversion receiver has been developed. In GMSK mode, a direct conversion transmitter with third order /spl Sigma//spl Delta/-modulation loop modulates the phase of the VCO. The output signal is amplified by a low noise power efficient limiting output buffer with 6 dBm output power. A high linearity vector modulator is switched on to process the 8-PSK modulated EDGE signal with additional amplitude modulation. Neither TX-SAW nor third harmonic filter are needed for system integration into a handset to fulfil the GSM-EDGE specification.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f7a18a92d113dde28c32e06a01a467b2 https://doi.org/10.1109/rfic.2004.1320644 Zobrazit plný text záznamu