The analysis of crosstalk between ports of integrated balanced mixers is difficult because the circuit is strongly nonlinear and the crosstalk depends on information which, if it is known at all, is not always provided by the foundry. This paper presents a general method for calculating mixer crosstalk. Device measurements are combined with periodic small-signal analysis to yield the crosstalk ...

Narrow band Low Noise Amplifiers (LNA) use inductors for band selection and input matching to reduce power consumption and reduce thermal noise generation. The LNA amplifies all signals within its fixed band, including blocking signals. This requires a larger dynamic range from the rest of the front end (mixers and analog to digital converters (ADC)). This paper presents a solid state active in...

Abstract We derive general analytical expressions for matching the complex impedance of feeding radio frequency (RF) circuit to a twin junction device in Superconductor-Insulator-Superconductor (SIS) mixers. A unique feature our analysis is that it allows junctions different admittance and an RF with admittance. This provides important design flexibility accommodates fabrication tolerances. the...

The development of the Heterodyne Instrument for the Far-Infrared (HIFI) requires lownoise SIS mixers for frequencies up to 1.25 THz. Past work has shown that the integration of a NbTiN/SiO2/Al tuning circuit with standard Nb SIS junctions enables the development of state-of-the-art heterodyne receivers for frequencies up to at least 1 THz [1-3]. Following from the results of this previous work...

A direct conversion modulator-demodulator with even harmonic mixers with emphasis on noise analysis is presented. The circuits consist of even harmonic mixers (EHMs) realized with antiparallel diode pairs (APDPs). We evaluate the different levels of I/Q imbalances and DC offsets and use signal space concepts to analyze the bit error rate (BER) of the proposed transceiver using M-ary QAM schemes...

Recently deep submicron and SiGe (silicongermanium) bipolar CMOS technologies have enhanced the performance of Si-based radio frequency (RF) integrated circuits up to microwave frequencies. The integration of RF MEMS components, such as inductors and capacitors, could further improve the performance of key RF circuit blocks such as voltage controlled oscillators (VCO), low-noise amplifiers, fil...

The design of membrane-based Schottky planar diode frequency triplers to 1.9 THz is discussed. Both, balanced and unbalanced circuit designs are proposed and compared. The simulations show that with 2.5 to 3.5 mW of input power the balanced triplers can produce sufficient power to pump hot electron bolometer mixers. However, if the available input power is limited to 1 mW then the unbalanced de...

1. Abstract This paper presents a modeling technique to be used in substrate coupling computation of mixed-signal circuits. Substrate crosstalk can negatively impact the performance of analog circuit elements such as mixers or amplifiers and can lead to a total breakdown of circuit parts. In order to forecast substrate-related problems and to analyze its influence EDA-tools are needed that can ...

Real-time analog multiplication of two signals is one of the most important operations in analog signal processing. The multiplier is used not only as a computational building block but also as a programming element in systems such as filters, neural networks, and as mixers and modulators in a communication system. Although high performance bipolar junction transistor multipliers have been avai...

Problem statement: Day by day more and more products rely on analog circuits to improve the speed and reduce the power consumption(Products rely on analog circuits to improve the speed and reduce the power consumption day by day more and more.). For the VLSI implementation analog circuit design plays an important role. This analog circuit synthesis might be the most challenging and time-consume...