A varactor diode configuration is presented for the implementation of low-distortion tunable matching networks, phase shifters, and filters. The configuration is based on varactors with an "exponential" C(V) relation in antiseries configuration with specific control voltage harmonic loading conditions. The resulting network combines a high capacitance… (More)
— Varactor diode-based circuit topologies, which can act as high-Q " distortion-free " tunable capacitive elements, are presented. These diodes are implemented in a novel ultra low-loss silicon-on-glass technology, with resulting measured Q's of over 200 at 2 GHz. The measured IM3 improvement compared to traditional single varactor tuning techniques is… (More)
A low-loss, low-distortion continuously tunable matching network, is demonstrated at 2 GHz in a silicon-on-glass varactor IC technology. The tuner uses an optimized varactor configuration to minimize distortion, and exhibits less than 0.5 dB loss and IM3<-50 dBc at 27 dBm output power, and tunes with a VSWR>250:1 to 1:1.
Two highly integrated ultra-low-power binary phase-shift keying (BPSK) receivers for short-range wireless communications are presented. The receivers consist of a power divider, two injection-locked RC oscillators with limiting buffers, and an xor output stage. The demodulation principle exploits the dynamic phase response of the two BPSK signal injected… (More)
Design trade-offs are presented for varactor-based variable phase-shifters in terms of size, tuning range, bandwidth/phase linearity and large-signal performance. Based on this study, a compact, low-loss (0.6dB/90deg @ 1.0 GHz), wideband and extremely linear varactor-based phase shifter is presented.
Microwave characterization of an integrated inductor is often carried out with respect to a local ground reference. The measurement outcome, however, does not necessarily reproduce the behavior of the device in an actual circuit where a ground reference does not exist. Furthermore, inductor measurements can be affected by the unequal currents on the inner… (More)
This paper presents a 1.8GHz prototype class-AB power amplifier using a QUBIC4G (SiGe, ft=40GHz) handset device with adaptive in-and output matching networks. The realized amplifier provides: 13dB gain, 28 dBm output power, with an efficiency greater than 33-51% over a 10dB output power control range. I. INTRODUCTION The power amplifier stage in a mobile… (More)
Fine frequency tuning based on injection locking applicable to analog and digitally-controlled LC quadrature-oscillators is proposed. The operating frequency varies linearly with relative strength of the controllable injected signal with a slope proportional to 1/2Q. Its linear characteristic makes it suitable for digitization. An 8 GHz prototype fabricated… (More)
In this work a highly integrated, ultra-low-power BPSK receiver for short-range wireless communications is presented. The receiver consists of a power divider, two injection-locked RC oscillators with limiting buffers and an XOR output stage. The demodulation principle is based on the dynamic phase response of the two BPSK signal injected oscillators. As… (More)