KEYWORDS: Photomicroscopy, Oscillators, Receivers, Linear filtering, Bandpass filters, Logic, VHF band, Signal detection, Sensors, Digital signal processing
High speed frequency dividers are critical parts of frequency synthesisers in wireless systems. These dividers
allow the output frequency from a voltage controlled oscillator to be compared with a much lower external
reference frequency that is commonly used in these synthesisers. Common trade-offs in high frequency dividers
are speed of division, power consumption, real estate area, and output signal dynamic range. In this paper
we demonstrate the design of a high frequency, low power divider in 0.18 µm SiGe BiCMOS technology. Three
dividers are presented, which are a regenerative divider, a master-slave divider, and a combination of regenerative
and master-slave dividers to perform a divide-by-8 chain. The dividers are used as part of a 60 GHz frequency
synthesizer. The simulation results are in agreement with measured performance of the regenerative divider.
At 48 GHz the divider consumes 18 mW from a 1.8 V supply voltage. The master-slave divider operates up to
36 GHz from a very low supply voltage, 1.8 V. The divide-by-8 operates successfully from 40 GHz to 50 GHz.
KEYWORDS: Standards development, Local area networks, Global Positioning System, Licensing, Internet, Network security, Manufacturing, Sensors, Analog electronics, Digital electronics
Wireless Local Area Networks have proven to be an extremely dynamic market area and fruitful for a number of companies around the world. This paper takes a look at short to medium term areas of wireless R&D that might be carried out in universities and may benefit the Australia business situation.
Wireless Local Area Networks (WLANs) have rapidly matured from a curiosity to a 'must have' for many personal computer users. This has been made possible by the incredible development that has occurred in WLAN chipsets over the past few years. From a 'You can't do that in CMOS!' to a 'Gee, I didn't think you could do that in CMOS!', cheap mass produced WLAN chipsets have flooded the market. This paper will summarize some recent developments and look at some future trends in this exciting area.
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