A new CMOS active mixer topology can operate at 1 V supply voltage by use of SCM (switched currentmirror). Such current-mode mixer requires less voltage headroom with good linearization. Mixing is achieved with four improved current mirrors, which are alternatively activated. For ideal switching, the operation is equivalent to a conventional active mixer. This paper analyzes the performance of ...

Passive mixers have insertion loss that requires compensation in either the RF or IF gain stages to establish the overall desired receiver noise figure performance. For these passive mixers, the user must not only consider the third-order input intercept points (IIP3), but should also consider the output third-order intercept point (OIP3) when comparing the performance to integrated mixers. Pas...

Accompany with the rapid development of millimeter-wave science and technology, subharmonically pumped mixers has received more and more attention. In this study, a balanced sub-harmonic fixtuned mixer is designed based on combination of linear/nonlinear circuit simulation. It is realized based on rogers substrate process to minimize the cost and simplify the assembly. The mixer works in the 91...

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 ...

In this thesis the linearity characteristics of passive mixers for wide band homodyne receivers are studied. The circuits are simulated using Cadence Spectre with models from a 65 nm RF/Analogue CMOS process. Linearity dependence of common mode voltage, load impedance, switch network arrangement and local oscillator drive circuitry is studied and analysed. The thesis also covers methods for the...

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...

The LTM®9003 is a 12-bit digital pre-distortion μModule® receiver subsystem for the transmit path of cellular basestations. Utilizing an integrated system in a package (SiP) technology, it includes a downconverting mixer, wideband fi lter and analog-to-digital converter (ADC). The system is tuned for an intermediate frequency (IF) of 184MHz and a signal bandwidth of up to 125MHz. The 12-bit ADC...

T growing market of portable wireless communication systems, such as wireless (cordless and cellular) phones, wireless local area network (WLAN) and the global positioning system (GPS) has increased the need for low-cost and high-performance receivers. The zero intermediate frequency (ZIF) receiver is often used to avoid the image-frequency, but this architecture suffers from the flicker noise ...

This article presents an agile passive-mixer-first superheterodyne RF front-end that utilizes a gigahertz acoustic filter as its intermediate-frequency (IF) load-essentially mixer-first acoustic-filtering front-end. The passive mixer frequency-translates sharp but fixed-frequency response to much higher and mixer-clock-defined tunable frequency while preserves input matching, high linearity, in...

The design and measured results of a compact, low cost, low conversion loss microstrip single balanced Schottky diodes mixer is proposed. This mixer is designed for Ka-band satellite transponder simulator to convert the 30 GHz radio-frequency (RF) signal down to the 20GHz intermediate-frequency (IF) signal with 9.8 GHz local oscillator (LO) frequency. This design takes full advantage of the fre...