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Proceedings ArticleDOI
Shawn Patrick Stapleton, Le Dinh Quach 
10 May 1992
9 Citations
Coupled with adaption algorithms, the receiver can compensate for slow variations in power amplifier characteristics, where adjacent channel interference is created by power amplifier nonlinearities.
This paper presents the first quadrature RF receiver front-end where, in a single stage, low-noise amplifier (LNA), mixer and voltage-controlled oscillator (VCO) share the same bias current.
We propose a high-speed operational amplifier for a low-pass filter in a direct conversion receiver.
A receiver circuit modified from a parametric amplifier-based design [6] further improves the area and power efficiency.
Proceedings ArticleDOI
28 Oct 1985
15 Citations
They mix unusually well in this receiver, and deliver significant power to the IF amplifier.
We show that an amplifier-free bias-free receiver can be expected to offer advantages in terms of energy consumption, signal-to-noise ratio, footprint, and delay.
The result is a load-modulation power amplifier architecture able to perform an active, modulated match over an octave bandwidth.
The proposed amplified system causes a great increase in the measured input power to the receiver subsystem compared to when no amplifier has been utilized.
Full layout simulation indicates that an optical receiver front-end amplifier designed on these principles will exhibit gain-bandwidth independence through the GHz region.
The implemented mixer-first receiver allows a high performance of the system due to its linearity up to an input power of -10 dBm.

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