A silicon BiCMOS direct up-conversion transmitter IC for CDMA2000 with linear-in-dB power optimized RF level control

Daanen, A.; Aggarwal, Sudhir; Locher, Miriam A.; Redman-White, W.; Charlon, O.; Landesman, A.; Judson, M.; Bracey, M.; Duperray, David; Razzell, C.; Akylas, V.; Brunel, D.; Comte, Renaud

doi:10.1109/isscc.2003.1234295

Cited by 13 publications

(3 citation statements)

References 3 publications

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“…The transmitter is capable of adjusting the output power in 1dB steps over a 75dB range. This gain control is shared between baseband and RF for optimum current consumption [2]. The LO leakage is tuned down to -30dBc within the baseband section with DC offset compensation DACs.…”

Section: Iiia Receivermentioning

confidence: 99%

A low power, high performance SiGe BiCMOS 802.1 6e dual conversion transceiver IC

Locher

Kuenen

Daanen

et al. 2007

2007 IEEE Mobile WiMAX Symposium

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This paper describes a low power, high performance double conversion WiBro/WiMAX 802.16e radio transceiver optimized for mobile applications and coexistence with on-board Cellular and WLAN/Bluetooth systems. It is fabricated in a SiGe BiCMOS process and achieves a receiver NF of less than 2.5dB at an operation frequency of 2.35GHz. The transmit gain can be digitally tuned over a 75dB range. The transceiver consumes 125/135mA at a 2.8V supply in OFDMA Rx/Tx modes respectively.

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Section: Iiia Receivermentioning

confidence: 99%

A low power, high performance SiGe BiCMOS 802.1 6e dual conversion transceiver IC

Locher

Kuenen

Daanen

et al. 2007

2007 IEEE Mobile WiMAX Symposium

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“…For instance, with regard to IEEE802.11, the number of presentations was previously one each for 11a and 11b in 2001 [1,2] but subsequently increased to four each in 2003 [3][4][5][6][7][8][9][10]. With regard to UMTS, two presentations in 2001 [11,12] were followed by four in 2003 [13][14][15][16]. Hence, the degree of attention to wider bandwidth has been extremely high for the past two years.…”

Section: Trends Of Wireless Communication Systems and Architecture Ofmentioning

confidence: 99%

Trend of wireless communication systems and wide-band circuits

Watanabe

Yamaji

Itakura

et al. 2004

Electron. Comm. Jpn. Pt. III

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SUMMARYDue to requirements for large-capacity data communication, the bandwidth of wireless communication systems such as cellular phones and wireless LAN has been increased. In this paper, the recent trends of wireless communication systems are reviewed with an emphasis on the receiver analog front end. In addition, a design technique for wide-band circuits is described, with the mixer in the receiver as an example.

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“…Other designs employing zero IF (ZIF) for U.S. CDMA have opted to use a separate low-noise amplifier (LNA) to achieve this isolation [5]. A companion transmitter IC [6] also uses a direct conversion scheme to keep total system costs to a minimum.…”

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confidence: 99%

A CDMA2000 zero-IF receiver with low-leakage integrated front-end

Waite

Chen

et al. 2004

IEEE J. Solid-State Circuits

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I. SYSTEM REQUIREMENTS INCREASED levels of radio integration with low external component count are essential for cellular handset manufacturers to achieve low product cost. These demands have led to the popularity of low and zero intermediate frequency ( As a full duplex system, one of the key challenges that CDMA2000 presents is dealing with signal leakage from transmit to receive paths; at the present state of the art, separate transmit and receive chips are the rule to avoid substrate-and package-related signal coupling. For the receiver alone, there is also the requirement to tolerate and indeed to work with legacy narrow-band FM analog systems (AMPS) in the same 880-MHz frequency spectrum [1] (Fig. 1), leading to several severe performance restrictions, in terms of input linearity, local oscillator (LO) leakage, and LO phase noise. In this design, we tackle the first two requirements, and meet the limits with a fully integrated signal path. Other designs employing zero IF (ZIF) for U.S. CDMA have opted to use a separate low-noise amplifier (LNA) to achieve this isolation [5]. A companion transmitter IC [6] also uses a direct conversion scheme to keep total system costs to a minimum. II. ZIF RECEIVER ARCHITECTUREThe overall system architecture is shown in Fig. 2, and the key performance requirements are given in Tables I and II. The worst case interference scenario is presented in Fig. 1, where transmit leakage cross-modulates with a strong adjacent FM carrier. This situation tends to dictate the linearity performance specifications. In practical designs, the attenuation afforded at the input by commercial duplexer blocks is typically around 55 dB, which is insufficient to keep the power in the transmit spectrum present at the receiver input low enough to eliminate this cross-modulation problems associated with FM carriers. To minimize the impact of cross-modulation without employing a sharper, more lossy (and costly) filter at this point, the LNA must have very high linearity (IIP3 of 9 dBm). Note that even with this demanding performance, it is necessary to employ an additional bandpass SAW filter in the receive path between the LNA and the mixer to provide additional attenuation of transmit band leakage (typically 40 dB) and thus ease the mixer linearity requirements.An external oscillator module running at double the required frequency provides the drive to the LO quadrature generator. The signal path is split into in-phase (I) and quadrature (Q) paths in the mixer switching core and passed to low-pass channelselection filters. III. LNA DESIGNThree gain settings are used to achieve the best overall gain and linearity; only high ( 15-dB) and low ( 5-dB) gain settings are shown for clarity. The target here is to achieve 20-dB reverse isolation in all gain modes. To meet the overall leakage requirements, the majority of the required 80-dBm isolation is then achieved in the mixer core and its associated interfaces, and maintained with careful layout and pad assignments.To meet the need for very high reverse ...

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A silicon BiCMOS direct up-conversion transmitter IC for CDMA2000 with linear-in-dB power optimized RF level control

Cited by 13 publications

References 3 publications

A low power, high performance SiGe BiCMOS 802.1 6e dual conversion transceiver IC

A low power, high performance SiGe BiCMOS 802.1 6e dual conversion transceiver IC

Trend of wireless communication systems and wide-band circuits

A CDMA2000 zero-IF receiver with low-leakage integrated front-end

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