This paper proposes a wideband common-gate LNA using capacitive feedback. The transconductance of the proposed LNA can be enlarged and noise figure can be improved while the conventional common-gate LNA has to use a smaller transconductance for the input impedance matching. In the experimental results using a 0.18-μm CMOS technology, the gain is 13.4 dB, NF is 2.7 dB, IIP3 is −7 dBm at 0.8GHz, ...

In this paper presents a optimization of linearity of low noise amplifier by using post linearization techniques. in this technique we have used diode connected mosfet as IMD sinker also used interstage matching for gain enhancement and reducing the effect of nonlinearity in common gate stage of cascode amplifier, this has done by using UMC .18um CMOS Technology in cadence tool. We got gain 14d...

In this paper, we present the low noise amplifier using new feedback connection configurations. The UWB LNA is design in 0.18 m TSMC CMOS technique to achieve high gain, small size and low noise. The LNA achieved 11 dB of average power gain, low 2.87 dB noise figure (NF), -10.9 dB input match, -7 dB return loss, -3 dBm of IIP3 and only 0.54 mm size with 15 mW power consumption.

This paper describes a 1.5-V 5 GHz I/Q down conversion mixer in a 0.18-μm CMOS process. The mixer achieves a conversion gain of 12.7 dB within 1-dB compression point (iCP1dB) of -15.83 dBm. It also achieves a double side band (DSB) NF of 13.5 dB. The mixer's IIP3 is -5.94 dBm. The mixer consumes only 5.72 mA of current from a 1.5-V power supply. Key-Words: Analog RF-CMOS, IEEE 802.11a, IEEE 802...

A widely tunable 4th order BPF based on the subtraction of two 2nd order 4-path passive-mixer filters with slightly different center frequencies is proposed. The center frequency of each 4-path filter is slightly shifted relative to its clock frequency (one upward and the other one downward) by a gm-C technique. Capacitive splitting of the input signal is used to reduce the mutual loading of th...

The signals used in UMTS have wide bandwidth and high crest factors. Circuit designers use sinusoids to design and simulate their building blocks. Formulas are presented relating the various distortion effects of the W-CDMA signals like adjacent channel leakage ratio (ACLR), cross modulation or intermodulation to well-known linearity measures like input intercept point of third(IIP3) and second...

As scaling reduces the breakdown voltage of CMOS devices and as system integration trends demand the further elimination of offchip components, there arises a great need to improve the linearity of RF receivers. Of particular interest is the direct-conversion architecture, which is currently the workhorse of the mobile telecommunications industry. Although much work has been recently reported i...

The MAX2530 receiver RF front-end IC, using Maxim's advanced SiGe process, was originally designed for cellular-band and PCS band operation. For 450MHz CDMA, the NF (noise figure) and the IIP3 (input third-order intercept) of the low noise amplifier (LNA) are very critical in considering the sensitivity, and the single-tone desensitization effect. This technical note gives the tuning method and...

Interest in SOI technology has been increased due to recent progress in modeling parasitic effects needed for analog IC design. In this paper a brief overview of the SOI technology is done. A user compiled model built for ADS is then described before the analysis of 2 RF designs: a wideband Low Noise Amplifier (300MHz-900MHz with more than 10dB gain and 5dBm IIP3) and an antenna switch (with 0....