Low-Frequency Noise and Passive Imaging With 670 GHz HEMT Low-Noise Amplifiers

High-Frequency Matching of Low-Noise Amplifiers

Moving to higher transition frequencies, lower supply voltages and smaller dimensions are, nowadays, general trends in the semiconductor industry. While operating at lower supply voltages results in a low-power design, smaller dimensions allow the use of a large number of transistors, a high transition frequency (fT) is accepted as an almighty-good, opening a way to a design of the amplifiers w...

Design and Fabrication of a 9–11 GHz Balanced Low Noise Amplifier Using HJFET

This paper describes the design of an X-band balanced low noise amplifier (LNA) using an available HJFET device. The balanced LNA consists of a pair of electrically similar transistors whose input and output signals are divided or combined by 3 dB two-stage Wilkinson power dividers. The proposed balanced LNA is fabricated and measured. The measured results show that the noise figure is 1.30 dB ...

THESIS FOR THE DEGREE OF LICENTIATE OF ENGINEERING GaN HEMT Low Frequency Noise Characterization for Low Phase Noise Oscillator Design

High-Frequency Low-Noise Amplifiers and Low-Jitter Oscillators in SiGe:C BiCMOS Technology

This paper describes the design of noise-critical circuits for radio-frequency and high-speed digital applications in a SiGe:C BiCMOS technology. Starting with a figure of merit for the high-frequency noise behavior of bipolar transistors, challenges in the transistor design are formulated. It is shown that the addition of carbon to the base of a SiGe-HBT results in an excellent high-frequency ...

Low frequency noise and annoyance.

Low frequency noise, the frequency range from about 10 Hz to 200 Hz, has been recognised as a special environmental noise problem, particularly to sensitive people in their homes. Conventional methods of assessing annoyance, typically based on A-weighted equivalent level, are inadequate for low frequency noise and lead to incorrect decisions by regulatory authorities. There have been a large nu...