Linearity is an important measure of an analog amplifier performance and normally measured by the 3rd order inter-modulation product (IP3) under a two-tone test. In this paper, we propose a test scheme that generates test tones using a built-in direct-digital synthesizer (DDS). Radio Frequency (RF) test tones are generated by converting the DDS output to RF using a built-in analog mixer that ca...

In this paper, a double balanced radio frequency multiplier is presented which is customized for transmitted reference ultra wideband (UWB) receivers. The multiplier uses 90nm model parameters and exploits compensating transistors to provide controllable gain for a Gilbert core. After performing periodic and quasiperiodic non linear analyses the RF mixer (multiplier) achieves a voltage conversi...

This paper proposes to merge an I/Q current-commutating mixer with a noise-canceling balun-LNA. To realize a high bandwidth, the real part of the impedance of all RF nodes is kept low, and the voltage gain is not created at RF but in baseband where capacitive loading is no problem. Thus a high RF bandwidth is achieved without using inductors for bandwidth extension. By using an I/Q mixer with 2...

In principle, millimeter and submillimeter heterodyne receivers using state-of-the-art SIS detectors are capable of extremely large instantaneous bandwidths with noise temperatures within a few Kelvin of the quantum limit. We are applying modern design tools, such as 3D electromagnetic simulators and Caltech’s SuperMix SIS analysis package, to develop a new generation of waveguide SIS mixers wi...

Abstract—The design of a differential K-band UWB (Ultra Wideband) Short Range Radar (SRR) transmitter in 90 nm bulk CMOS is presented. Implementation of SRRs in deep submicron CMOS technology is attractive, in terms of cost and monolithic integration of RF font-end with signal baseband processor. The transmitted pulse bandwidth limits the range resolution of the radar system. Due to the wide ba...

Radio astronomy requires SIS mixers and receivers with very high stability. The goal for the total power stability of the ALMA receivers is 1x10 over 1 second. The SIS mixer is one of the most critical components in the receiver signal chain determining stability. Most changes in mixer noise and gain are due to variations of its operating conditions. In this paper we present accurate measuremen...

Frequency translation which converts the original signal to a much lower baseband frequency signal is a vital role in the RF receiver design. In this work, a high linear down-conversion Gilbert cell mixer at 100MHz is designed using TSMC 0.18μm RF CMOS process. Linearity is an important performance measure in RF circuits particularly in mixer design. In this paper, the two types of linearizatio...

9 The effect of mixer shear strain rate on the performance of a model 10 micro-crystalline cellulose pharmaceutical paste undergoing extru11 sion–spheronisation was studied using a laboratory scale planetary 12 mixer and a screw-based mixer. The maximum shear strain rate in 13 each mixer was estimated. Five pastes were prepared, one each at 14 97 and 265 s−1 in the planetary mixer, and one each...

This paper presents a low voltage wideband downconversion mixer using current-mode approach for multi-standard receivers. The proposed mixer uses a current mirror amplifier with an embedded passive switching core to achieve mixing function, which can combine the advantages of active and passive mixers simultaneously. The mixer is implemented using a 0.18μm CMOS technology and covers frequency b...

This paper presents the design methodologies and implementation of HEMT RF down conversion Mixer for 1.8 GHz to 5 GHz wireless and mobile applications.In many recent receiver designs, the front-end mixer determines the receiver's sensitivity and better isolation for the system. Single transistor mixer are developed for such an applications i.e. a Common source configuration, where the LO signal...