A 900-MHz bandwidth analog baseband circuit with 1-dB step and 30-dB gain dynamic range

Hosoya, Masahiro; Mitomo, Toshiya; Watanabe, Osamu

doi:10.1109/esscirc.2010.5619744

Cited by 18 publications

(10 citation statements)

References 3 publications

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“…Compared to the state of the art, this baseband system offers a complete solution for a phased array receiver, while the power consumption is below 42 mW. Other works introduce part of the required functionality, e.g., beamforming in [3], [4], or VGAs and filters in [6], [8], [14], [15]. Also the circuits in the mentioned publications do not report sufficient linearity over the whole gain range to drive a typical ADC with a full-scale input.…”

Section: Resultsmentioning

confidence: 99%

“…10) utilizes a series-shunt feedback configuration for improved linearity, as it should deliver a full-swing input to an ADC. The voltage gain is approximately equal to: (6) It is varied, by implementing as a programmable bank of resistors. This approach is preferable to programming for gain variation.…”

Section: E Vgamentioning

confidence: 99%

“…BEAMFORMING LOWPASS FILTER Channel selection filtering for applications with wide baseband bandwidths, such as 60 GHz communications, typically use the gm-C topology [6]- [8]. Another alternative solution (also based on the ratio) is the source-follower-based filter [9], but it is not practical in our case due to headroom issues.…”

Section: Introductionmentioning

confidence: 99%

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A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

Szortyka

Raczkowski

Kuijk

et al. 2015

IEEE Trans. Circuits Syst. I

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This paper presents an analog baseband beamforming topology, which combines phase shifting, signal combination, and biquadratic lowpass filtering in one block. This reduces the number of stages cascaded in a receiver chain, leading to a shorter signal path, thus improving the dynamic range. Flexibility of the proposed solution is illustrated with different possible implementations depending on the top-level chip floorplan. It is shown that the proposed structure does not introduce extra power consumption compared to the conventional approach, while obtaining a higher SNR. A four-antenna-path version of the proposed topology is implemented in 40 nm low-power CMOS as a prototype together with a variable gain block forming a complete analog baseband section for a phased-array receiver. The functionality includes beamforming with a resolution better than 6.8 degrees, fourth-order lowpass filtering with a 1 GHz cutoff frequency, variable gain between 10.6 and 30 dB and automatic DC offset compensation. Output IP3 above 10 dBm and output noise below 4.2 mVrms over the whole gain range yield an SFDR larger than 31.2 dB, which is sufficient for 16-QAM modulation according to IEEE 802.11ad. The circuit consumes between 30 and 42 mW. Index Terms-Amplifier, analog integrated circuits, baseband phase shifting, CMOS, lowpass filters, variable gain.1549-8328

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Section: Resultsmentioning

confidence: 99%

Section: E Vgamentioning

confidence: 99%

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A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

Szortyka

Raczkowski

Kuijk

et al. 2015

IEEE Trans. Circuits Syst. I

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“…A 6-stage VGA can digitally controls its gain by 1-dB steps [3], which enables precise gain control together with received signal strength measurements in digital domain. A 5-bit 1.12-GS/s flash ADC has a foreground calibration scheme for improving linearity [4].…”

Section: Transceiver Designmentioning

confidence: 99%

A −70dBm-sensitivity 522Mbps 0.19nJ/bit-TX 0.43nJ/bit-RX transceiver for TransferJet™ SoC in 65nm CMOS

Miyashita

Agawa

Kajihara

et al. 2012

2012 Symposium on VLSI Circuits (VLSIC)

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TransferJet TM is an emerging high-speed close-proximity wireless communication standard, which enables a data transfer of up to 522Mbps within a few centimeters range. We have developed a fully integrated TransferJet SoC with a 4.48-GHz operating frequency and a 560-MHz bandwidth (BW) using 65nm CMOS technology. Baseband filtering techniques for both a transmitter (TX) and a receiver (RX) are proposed to obtain a sensitivity of -70dBm with low power consumption. The SoC achieves an energy per bit of 0.19nJ/bit and 0.43nJ/bit for the TX and the RX, respectively, We have also built the world's smallest module prototype using the SoC, which is suitable for small mobile devices.

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“…Neither the digital-to-analog converter nor the lowpass reconstruction filter is implemented here. As a typical lowpass filter has a voltage output [5], [6], while the beamformer operates mainly in the current domain, a transconductor is placed in front of the beamformer. After signal splitting and buffering, a phase shift is applied in each antenna path.…”

Section: Introductionmentioning

confidence: 99%

Analog baseband beamformer for use in a phased-array 60 GHz transmitter

Szortyka

Raczkowski

Vandebriel

et al. 2012

2012 IEEE 12th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems

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This paper presents an analog baseband section that implements the beamforming functionality of a 40 nm digital low-power (LP) CMOS 60 GHz transmitter. An input 1dB compression point larger than 240 mV peak over the whole band is obtained, in a circuit operating with a 1.1 V supply. The targeted phase shift resolution of 22.5 degrees is obtained. Fully automatic, digitally assisted DC offset compensation is also present on-chip. The current consumption is 70 mA.

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A 900-MHz bandwidth analog baseband circuit with 1-dB step and 30-dB gain dynamic range

Cited by 18 publications

References 3 publications

A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

A −70dBm-sensitivity 522Mbps 0.19nJ/bit-TX 0.43nJ/bit-RX transceiver for TransferJet™ SoC in 65nm CMOS

Analog baseband beamformer for use in a phased-array 60 GHz transmitter

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A 900-MHz bandwidth analog baseband circuit with 1-dB step and 30-dB gain dynamic range

Cited by 18 publications

References 3 publications

A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

A Wideband Beamforming Lowpass Filter for 60 GHz Phased-Array Receivers

A &#x2212;70dBm-sensitivity 522Mbps 0.19nJ/bit-TX 0.43nJ/bit-RX transceiver for TransferJet&#x2122; SoC in 65nm CMOS

Analog baseband beamformer for use in a phased-array 60 GHz transmitter

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About

A −70dBm-sensitivity 522Mbps 0.19nJ/bit-TX 0.43nJ/bit-RX transceiver for TransferJet™ SoC in 65nm CMOS