This paper will present work on a recharged comparator using Semi Floating-Gate (SFG) MOS devices. The output voltage of a basic SFG MOS Comparator circuit is normally interleaved with a recharge voltage. This prohibit control of passgates, which requires binary control signals. An output buffer is introduced to allow the control of pass-gates and multiplexers (MUXs) beyond a single recharge cl...

Abstract The article will present the array antenna system for Monopulse tracking application. Antenna includes 3 parts: monopulse comparator, unequal power divider, and array. comparator divider are designed by microstrip line on PCB. consists of 244 Vivaldi elements. Conducted simulation obtained following results: bandwidth is greater than 10% with Voltage Standing Wave Ratio smaller 1.6 (VS...

A four-way power divider/power combiner using substrate integrated waveguide (SIW) and microstrip lines is proposed and investigated. The proposed power divider consists of a double-layer substrate with a bottom layer including an SIW T-junction and a top layer including a microstrip network. This microstrip network consists of a modified Gysel power divider which provides a high isolation betw...

An arbitrary multi-way radial power divider/combiner with high-power capacity based on the coaxial waveguide TE 01 -mode is presented in this paper. The study of shows divider can operate base mode a large diameter, which allow waveguides to be radially distributed along circumference waveguide. equivalent circuit model used analyze its design procedure including matching section, improve trans...

A novel design of a dual-frequency unequal power divider is presented. The design is optimized using a genetic algorithm based method in order to satisfy several requirements at two given frequencies. The method considers realistic conditions, since it assumes lossy transmission lines and unmatched real or frequency-dependent complex loads. The method can be applied in a wide range of applicati...

A MMIC colpitts oscillator in push-push configuration is presented using InGaP/GaAs HBTs. The output at the second harmonic enhances the frequency range while preserving the well-known advantages of the Colpitts concept. Moreover, additional features like enhanced load-pull immunity and inherent frequency divider functionality are included. The MMIC VCO reaches state-of-the-art phasenoise perfo...

The paper proposes a methodology for the determination of the locking range of an Injection-Locked Frequency Divider. The technique involves the use of the Warped Multi-time scale model and is applicable to oscillators in general. The ability to determine, in an efficient manner, the locking ranges of Injection Locked Frequency Dividers is of great importance to design engineers as ILFDs are su...

A 1.2V 5GHz low-cost voltage-controlled oscillator (VCO) with active common mode feedback has been implemented in a CMOS/RF 90nm technology for a robust I/Q generation using a frequency divider-by-2 (DIV2). As the input common mode of the DIV2 affects critically its performance, a calibration method to correct the output common mode of the VCO has been proposed and validated through post-layout...

In direct-conversion orthogonal frequency division multiplexing (OFDM) receivers, the impact of frequency-dependent I/Q mismatch (IQ-M) with carrier frequency offset (CFO) must be considered. A preamble-assisted estimation is developed to circumvent the frequencydependent IQ-M with CFO. The results of a simulation and an experiment show that the proposed method could provide good estimation eff...

This paper presents a 0.13μm CMOS 1.7GHz VCO with frequency divider, suitable for ultra-low-power hearing-aid applications. The circuit has a 16% tuning range, a minimum power consumption of 320μW from a 0.8V power supply, power-supply and temperature compensation, an excellent 188dBc/Hz gure-of-merit without the need of off-chip components, and an area of 0.2mm.