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Although they are a relatively small proportion of the total number of logic gates in a logic path, latches and flip-flops add significantly to the total timing path delay of many logic paths, due to the significant cell delay time they introduce. We introduce new circuitry to isolate and accurately measure propagation delays in flip-flops and other non-simple logic structures in use at 45nm process...
In this paper, we present a complete modeling methodology for fully integrated inductively degenerated cascode ultrawideband low noise amplifiers (LNA) with generalized filter-based impedance matching networks. Our accurate analytical models capture the impact of device and passive component parasitics and transistor short channel effects to closely match circuit simulation results. Utilizing our...
In this paper, we present a systematic synthesis methodology for fully integrated wideband low noise amplifiers (LNA) that simultaneously optimizes impedance matching, noise figure, and other performance parameters. Leveraging a wideband model, we hierarchically couple global optimization techniques with local convex optimization methods to efficiently locate circuits in the complex design space....
In this paper, we present a systematic synthesis methodology for fully integrated wideband low noise amplifiers that simultaneously optimizes impedance matching, noise figure, and other performance parameters. Leveraging an accurate analytical model, we hierarchically couple global optimization techniques with local convex optimization methods to efficiently locate optimal wideband LNA circuits. The...
Given the increasing demand for integrated wireless systems in system-on-chip technology, narrow-band low noise amplifier (LNA) designs must be robust against variations in device parameters and passive component values to improve manufacturing yield for high volume applications. In this paper, we develop two design techniques for reducing the impact of component variations on narrow-band LNA performance...
This paper presents accurate modeling and automated design solutions for narrow-band low noise amplifiers (LNA) in system-on-chip technology. An analytical circuit model was developed that captures the impact of integrated spiral inductor parasitics and transistor short channel effects. The LNA synthesis methodology leverages deterministic numerical nonlinear optimization techniques to simultaneously...
The stability and programmability of digital signal processing systems has motivated engineers to move the analog-to-digital conversion (ADC) process closer and closer to the front end of many signal processing systems in order to perform as much processing as possible in the digital domain. Unfortunately, many important applications, including radar and communication systems, involve wideband signals...
In this paper, we present a complete modeling methodology for fully integrated lter-based ultrawideband low noise ampli ers (LNA). Our accurate analytical models capture the impact of device and passive component parasitics and transistor short channel effects to closely match circuit simulation results. Utilizing our method, we are able to accurately generate an ultrawideband LNA in the 3.1 to 10...
Many problems in radar and communication signal processing involve radio frequency (RF) signals of very high bandwidth. This presents a serious challenge to systems that might attempt to use a high-rate analog-to-digital converter (ADC) to sample these signals, as prescribed by the Shannon/Nyquist sampling theorem. In these situations, however, the information level of the signal is often far lower...
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