This paper presents a dc-coupled 900-MHz ISM band RF front-end for a short-range wireless receiver. The front-end, fabricated in a 0.5m CMOS process, is intended as a test vehicle to verify the proposed dc-coupled topology. In this topology, a lowfrequency feedback circuit suppresses the dc offset and low-frequency noise at the mixer output. The dc-coupled topology is compared with traditional ...

magnetic tunnel junction (MTJ) devices are emerging as a possible replacement for complementary metal-oxide semiconductors for radio-frequency (RF) signal generation. Advantages include low power consumption, small device area, and large frequency tunability. This paper shows that single devices cannot achieve the necessary noise performance for RF applications. Various coupling mechanisms are ...

For millimeter waves applications in the W-band 93.5-95.5 GHz, improved frequency synthesizers are highly demanded. Improved synthesizer should be tunable with high step resolution and possess phase noise performance, low spurious harmonic levels short locking time. These parameters conflicting developing a precision oscillator pure spectrum. Therefore, it's necessary to make compromisation bet...

A 2.4 GHz CMOS up-conversion mixer using novel current mirrors based on chartered 0.18 μm RF CMOS technology for 2.4 GHz wireless sensor network (WSN) application is presented in this paper. The current-reuse current-mirror and current-bleeding technique are used in the driver and switching stages of the mixer, respectively. The post-layout simulation results demonstrate that the novel up-conve...

A double balanced Gilbert-cell class-A amplifier bleeding mixer (DBGC CAAB mixer) is proposed and implemented. The injection current is utilized to amplify the local oscillator (LO) signal to improve the performance of the transconductor stage. The DBGC CAAB mixer achieves a conversion gain of 17.5 dB at −14 dBm LO power, and the noise figure is suppressed from 45 dB to 10.7 dB. It is important...

In this paper a low power CMOS sub-harmonic mixer based on the Gilbert cell for 2.4 GHz ISM band application is presented, in which the position of the switching and transconductance stages of mixer has been exchanged. A tuning out inductor has been used between the RF and LO switching stages to improve the linearity and noise figure, and also to enhance the conversion gain of the Mixer. The ut...

For 30 years Disc Jockeys have been expressing their musical ideas with scratching. Unlike many other popular instruments, the equipment used for scratching is not built as one single unit, and it was not intended to be a musical instrument. This paper gives an overview of how DJs use their turntable, vinyl record and audio mixer in junction to produce scratch music. Their gestural input to the...

An ultra-wideband mixer using standard complementery metal oxide semiconductor (CMOS) technology was first proposed in this paper. This broadband mixer achieves measured conversion gain of 11 1 5 dB with a bandwidth of 0.3 to 25 GHz. The mixer was fabricated in a commercial 0.18m CMOS technology and demonstrated the highest frequency and bandwidth of operation. It also presented better gain-ban...

Identity Mixer is an anonymous credential system developed at IBM that allows users for instance to prove that they are over 18 years old without revealing their name and birthdate. This privacy-friendly technology is realized using zero-knowledge proofs. We describe a formal model of Identity Mixer that is well-suited for automated protocol verification tools in the spirit of black-box cryptog...