Challenges for ultra-wideband (UWB) CMOS integration

Aiello, G.

doi:10.1109/mwsym.2003.1210952

Cited by 21 publications

(13 citation statements)

References 3 publications

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“…Therefore, the time-average of is taken into consideration. The autocorrelation of the total noise current at the load terminal contributed by the thermal noise due to the source resistance is (17) where denotes the time average of the signal . The first additive term in (17) represents the summation of the average noise powers of replica components of the thermal noise due to the source resistance.…”

Section: A Noise From the Driver Stage (Rf Stage) 1) Noise From The mentioning

confidence: 99%

“…The autocorrelation of the total noise current at the load terminal contributed by the thermal noise due to the source resistance is (17) where denotes the time average of the signal . The first additive term in (17) represents the summation of the average noise powers of replica components of the thermal noise due to the source resistance. The second additive term represents the summation of the crosscorrelations of any two replica components of the thermal noise due to the source resistance that propagate through any two distinct mixer paths toward the output terminal.…”

Section: A Noise From the Driver Stage (Rf Stage) 1) Noise From The mentioning

confidence: 99%

“…This notion provides an incentive to investigate the design of novel circuit topologies that achieve a gain-for-delay-tradeoff without affecting bandwidth, and thus operate at substantially higher frequencies than conventional circuits. One of the key circuit components in a UWB receiver is the front-end UWB mixer [17]. The introduction of traveling wave concept has provided very high frequency techniques to implement broadband integrated circuits.…”

Section: Introductionmentioning

confidence: 99%

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Design and analysis of an ultrawide-band distributed CMOS mixer

Safarian

Yazdi

Heydari

2005

IEEE Trans. VLSI Syst.

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Section: A Noise From the Driver Stage (Rf Stage) 1) Noise From The mentioning

confidence: 99%

Section: A Noise From the Driver Stage (Rf Stage) 1) Noise From The mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and analysis of an ultrawide-band distributed CMOS mixer

Safarian

Yazdi

Heydari

2005

IEEE Trans. VLSI Syst.

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“…Thus, high linearity is required of the transmitter amplifier. In the receiver, a total noise figure of about 7 dB is required (2) . Hence, less than 4 dB noise figure is required of the front-end low noise amplifier.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Amplifier MMIC for 3-10.6 GHz Wireless Applications with InGaP/GaAs HBT Technology

et al. 2007

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An ultra-wideband amplifier MMIC has been demonstrated for the Ultra-Wide-Band (UWB) standard with InGaP/GaAs Heterojunction Bipolar Transistor (HBT) technology. The fabricated MMIC chip size is only 0.53 mm by 0.93mm. The amplifier MMIC includes all matching circuits on the chip. This amplifier MMIC is applicable to both a UWB low noise amplifier and a UWB transmitter amplifier by changing the collector current. The operating bias currents are 15 mA for a low noise amplifier and 30 mA for a transmitter amplifier. The collector bias voltage is 3.0 V. The MMIC as a transmitter amplifier exhibits a gain of 16 +/-1 dB and a third-order intercept point at the input (IIP3) of 0 dBm with 6.0 and 6.01 GHz signals with equal amplitude level. As a low noise amplifier, the MMIC exhibits a noise figure of less than 3.7 dB from 3.1 to 10.6 GHz.Keywords : Ultrawideband Amplifier, InGaP/GaAs HBT, Low Noise Amplifier, MMIC, Transmitter amplifier IntroductionThe long term vision for Ultra-Wide-Band (UWB) products is to enable personal devices with integrated wireless connectivity. This requires 110, 200 and 480 Mbps at 10 m. One of the design challenges for the UWB system is the high operating frequencies (3.1-10.6 GHz) (1) . The UWB transceiver must have complexity similar to Bluetooth, in order to meet the stringent requirements of the IEEE 802.15.3a standard, even though it operates at a much higher bit rate. The low noise amplifier and transmitter power amplifier are the key components in addition to the fast switching PLL and the high bandwidth sampling rate A/D converter. The UWB spectral mask for indoor communication systems shows the maximum average output power is limited to -41.3 dBm (1) . Nevertheless the required linearity of the transmitter is far higher because peak power value is calculated to be about +2 dBm. Thus, high linearity is required of the transmitter amplifier. In the receiver, a total noise figure of about 7 dB is required (2) . Hence, less than 4 dB noise figure is required of the front-end low noise amplifier.Si CMOS devices are continuing scaling down. Using 0.18 µm CMOS technology, an amplifier which had a gain of 10.4 dB and a noise figure of 4.2 dB from 2.4 to 9.5 GHz frequency band was reported (3) . Moreover, an amplifier implemented in 0.13 µm CMOS technology exhibited a gain of 13 to 17 dB, a 3dB bandwidth of 8 GHz and 1 dB gain compression point of 3.5 dBm (4) . However, the dc consumption is really 100 mW, and 3-dB bandwidth is 8 GHz which is 2.6 GHz lower than that of UWB specification. Thus, current Si CMOS technologies are not sufficient to meet the technological requirements. In near future, it is expected that 90-65 nm CMOS technologies are available for microwave ICs. These CMOS technologies could have an f T of over 100 GHz with a breakdown voltage applicable to UWB transceivers. Thus, there are some possibilities that the CMOS technologies are used for UWB applications.A SiGe amplifier recently reported has a gain of 18 dB and a noise figure of 4.5 dB over the bandwidth from 3.1 ...

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“…This is a short range, low power, high data rate and wide band wireless system [1]. With the bandwidth of 528 MHz and other characteristics, UWB transceivers have to meet the stringent requirements of 802.15.3a standard [2]. Our research group approach for UWB transceivers is to use the dual conversion architecture [3].…”

Section: Introductionmentioning

confidence: 99%