A novel large input range source-follower based filter architecture

A novel large input range source-follower based filter architecture is proposed offering a increased 1-dB compression point, without increased power consumption. An alternative feedback mechanism enables single-ended use and simplifies the bias scheme. Simulation has confirmed a 250 MHz second order filter stage consuming 40 uA @ 1.2V supply in a 0.13 um CMOS technology with 1-dB compression point at a differential peak to peak input amplitude of 1.4V, more than doubling the input range of previous implementations with similar power dissipation

A 2.45-GHz +20-dBm 0.13 um CMOS class-E power amplifier with 52% PAE and a rise/fall-time configurable switch for TOA ranging applications

Abstract—This paper presents a 0.13 µm CMOS Class-E PA with 20.5 dBm maximum output power and 52.5% PAE. The PA covers a wide dynamic range from 1.5 dBm to 20.5 dBm. A novel configurable switch is applied for both ranging and communication. The measured fast rise time for ranging is merely 4.5 ns while the slow rise/fall time for communication is 90 ns, which allows a maximum data rate for return-to-zero BPSK modulation of 4 Mbps

A 2.45 GHz +20 dBm fast switching Class-E power amplifier with 43% PAE and a 18 dB wide power range in 0.18 um CMOS

In this brief, the losses in Class-E power amplifiers (PAs) with finite dc-feed inductance are analyzed. This analysis results in practical analytical expressions, which significantly simplify the design and optimization of Class-E PAs. To demonstrate their applicability, the design of a state-of-the-art 2.45-GHz differential cascode Class-E PA in 0.18-mu m CMOS with on-chip dc-feed inductor is presented. By the proposed combination of a dynamic supply voltage and a dynamic cascode bias voltage, high drain efficiency is achieved over a wide power control range, covering from 2.2 up to 20 dBm. At 20 dBm, a power-added efficiency as high as 43.6% was measured. Additionally, fast envelope switching is obtained by adding a single switch to the common-gate nodes of both the Class-E stage and the second driver stage. Measurements show a rise time of merely 2.5 ns and a 73-dB isolation between the ON- and OFF-states. These figures enable ranging applications with submeter accuracy