DESIGN OF 0.9-2.1 GHZ LOW-NOISE AMPLIFIER ON PRINTED CIRCUIT BOARD USING “VISUAL” DESIGN TOOLS

A compact, microstrip, two-stage, room temperature, single-ended low noise amplifier (LNA) is designed using commercial components for Aperture Tile in Focus (APERTIF), a square kilometre array (SKA) pathfinder project. Various techniques are investigated to insert inductance between the source pad of the package and the ground plane of the printed circuit board (PCB), with the chosen design able to do this using standard manufacturing techniques. The desired noise temperature of 25 K (noise figure (NF) of 0.36 dB) is met over the 1.0–1.8 GHz band, with an input return loss better than 10 dB.

Download Full-text

Op-amp based low noise amplifier for magnetic particle spectroscopy

Current Directions in Biomedical Engineering ◽

10.1515/cdbme-2017-0125 ◽

2017 ◽

Vol 3 (2) ◽

pp. 599-602

Author(s):

Ankit Malhotra ◽

Thorsten Buzug

Keyword(s):

Magnetic Particle ◽

Printed Circuit Board ◽

Noise Figure ◽

Superparamagnetic Iron Oxide ◽

Low Noise ◽

Low Noise Amplifier ◽

Circuit Board ◽

Input Noise ◽

Op Amps ◽

Noise Amplifier

AbstractMagnetic particle spectrometry (MPS) is a novel technique used to measure the magnetization response of superparamagnetic iron oxide nanoparticles (SPIONs). Therefore, it is one of the most important tools for the characterization of the SPIONs for imaging modalities such as magnetic particle imaging (MPI) and Magnetic Resonance Imaging (MRI). In MPS, change in the particle magnetization induces a voltage in a dedicated receive coil. The amplitude of the signal can be very low (ranging from a few nV to 100 μV) depending upon the concentration of the nanoparticles. Hence, the received signal needs to be amplified with a low noise amplifier (LNA). LNA’s paramount task is to amplify the received signal while keeping the noise induced by its own circuitry minimum. In the current research, we purpose modeling, design, and development of a prototyped LNA for MPS. The designed prototype LNA is based on the parallelization technique of Op-amps. The prototyped LNA consists of 16 Op-amps in parallel and is manufactured on a printed circuit board (PCB), with a size of 110.38 mm × 59.46 mm and 234 components. The input noise of the amplifier is approx. 546 pV/√Hz with a noise figure (NF) of approx. 1.4 dB with a receive coil termination. Furthermore, a comparison between the prototyped LNA and a commercially available amplifier is shown.

Download Full-text

A Summing Configuration based Low Noise Amplifier for MPI and MPS

Current Directions in Biomedical Engineering ◽

10.1515/cdbme-2018-0021 ◽

2018 ◽

Vol 4 (1) ◽

pp. 83-86 ◽

Cited By ~ 1

Author(s):

Ankit Malhotra ◽

Thorsten M. Buzug

Keyword(s):

Magnetic Particle ◽

Printed Circuit Board ◽

Noise Figure ◽

Imaging Modality ◽

Superparamagnetic Iron Oxide ◽

Input Voltage ◽

Low Noise ◽

Low Noise Amplifier ◽

Circuit Board ◽

Noise Amplifier

AbstractMagnetic particle imaging (MPI) is a novel tomographic imaging modality which uses static and dynamic magnetic fields to measure the magnetic response generated by superparamagnetic iron oxide nanoparticles (SPIONs). For the characterization of the SPIONs magnetic particle spectroscopy (MPS) is used. In the current research, a low noise amplifier (LNA) suitable for MPI and MPS is presented. LNA plays a significant role in the receive chain of MPI and MPS by amplifying the signals from the nanoparticles while keeping the noise induced through its own circuitry minimal. The LNA is based on the summing configuration and fabricated on a printed circuit board (PCB). Moreover, the prototyped LNA is compared with a commercially available pre-amplifier. The input voltage noise of the prototyped LNA with a receiving coil of series resistance of 0.551 mΩ and an inductance of 130 μH is 561 pV/√Hz with a noise figure (NF) of 11.57 dB.

Download Full-text

Design and Fabrication of a 1.5GHz Microwave Low Noise Amplifier with Suitable Low-noise and High Gain Characteristics

European Journal of Engineering Research and Science ◽

10.24018/ejers.2017.2.8.425 ◽

2017 ◽

Vol 2 (8) ◽

pp. 7

Author(s):

Cherechi Ndukwe ◽

Oliver Ozioko ◽

Okere A U

Keyword(s):

Communication Systems ◽

Printed Circuit Board ◽

Noise Figure ◽

High Gain ◽

Low Noise ◽

Low Noise Amplifier ◽

Circuit Board ◽

Source Impedance ◽

Wide Range ◽

Noise Amplifier

This paper presents the design, simulation and fabrication of a low noise amplifier with high gain of 1.5GHz. In communication systems, there is always difficulty in distinguishing the received signal from noise at very low signal powers. A low noise amplifier (LNA) is an effective and low-cost way of enhancing this signal quality through signal amplification at the receiver. In this work, LNA simulation and a novel design was carried out using the N76038A field effect transistor (FET). To ensure it is stable over a wide range of frequencies, the input and output stability of the transistor were plotted over its operating frequencies (0.1 GHz to 18 GHz). Constant gain and noise figure circles were plotted and the source impedance properly chosen. The input network was matched to the source impedance and conjugate matching used to match the output. The schematic was converted to microstrip and produced on a printed circuit board. Testing was carried out using the vector network analyser (VNA) and matching errors then corrected by calibration process. The fabricated LNA has a gain of 13.76dB and noise figure of 1.57dB which is in close agreement with a simulation result of 14.25dB and 1.56dB respectively.

Download Full-text

“Visual” Design of K-band Low-Noise Amplifier Using SiGe BiCMOS Technology

2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS) ◽

10.1109/icecs46596.2019.8964754 ◽

2019 ◽

Author(s):

Leonid I. Babak ◽

Andrey A. Kokolov ◽

Michail V. Cherkashin ◽

Feodor I. Sheyerman

Keyword(s):

Low Noise ◽

Low Noise Amplifier ◽

Visual Design ◽

Bicmos Technology ◽

Sige Bicmos ◽

Noise Amplifier ◽

K Band

Download Full-text

Meander Delay Compensation in High-Speed Digital Multilayer Packages

International Symposium on Microelectronics ◽

10.4071/isom-2012-tp27 ◽

2012 ◽

Vol 2012 (1) ◽

pp. 000334-000339 ◽

Cited By ~ 1

Author(s):

Robert Frye ◽

Kai Liu

Keyword(s):

High Speed ◽

Printed Circuit Boards ◽

Printed Circuit Board ◽

Circuit Board ◽

Propagation Time ◽

Design Tools ◽

Delay Compensation ◽

Printed Circuit ◽

Bga Packages ◽

Timing Skew

The routing of multi-trace digital signal buses in printed circuit boards often results in mismatches in the lengths of the lines. This results in mismatched propagation time, referred to as “timing skew” in a digital system. A common method that is used to compensate for this is to add meander sections of line to lengthen the signal path length. Many advanced circuit board design tools have the capability to perform this compensation automatically. Advanced Ball Grid Array (BGA) packages are fabricated using fine-line multilayer laminate substrates or they are built up using multilayer wafer-scale processes. The design tools for these types of packages have evolved from printed circuit board tools and typically use the same methods and principles. It is very common in BGA packages for high-speed digital applications to use meander trace patterns to match the trace lengths of high speed bus interconnections either from the chip to the solder balls or between chips in a multi-chip package. However, electromagnetic simulation of these packages shows that despite the use of these techniques to match the physical length of the traces, electrical lengths often vary by as much as a factor of two. Examples of such packages are presented and analyzed. The resulting timing skew is not a significant problem in most current applications, since the overall delay is small compared with the clock interval. But with emerging applications pushing well beyond 10Gb/s, timing skew in packages will be an important consideration. The reasons for the ineffectiveness of meander delay compensation are discussed, and are demonstrated by some simple simulations.

Download Full-text