The test of radiofrequency (RF) integrated circuits at their ever-increasing operating frequency range requires sophisticated test equipment and is time-consuming and, therefore, very expensive. This paper introduces a new method combining low-frequency actuation signal as test stimuli and signal envelope detection applied on the RF output signal in order to provide a low-cost mean for producti...

In vivo13C magnetic resonance spectroscopy (MRS) is a unique and effective tool for studying dynamic human brain metabolism and the cycling of neurotransmitters. One of the major technical challenges for in vivo13C-MRS is the high radio frequency (RF) power necessary for heteronuclear decoupling. In the common practice of in vivo13C-MRS, alkanyl carbons are detected in the spectra range of 10-6...

In software defined radio systems, placing the analog-todigital converter (ADC) near the antenna part in the block diagram of the receiver is desired to improve the flexibility of the system. The radio frequency (RF) sampling method, in which the received signal is sampled at the RF stage, realizes such structure. The undersampling is a potential method to sample the RF signal using the existin...

As device size scales down, there have been challenges to design conventional analog circuits, such as low voltage headroom and the low intrinsic gain of a device. Although ever-decreasing device channel length in CMOS technology has mainly negative effects on analog circuits, it increases device speed and reduces the power consumption of digital circuits. As a result, time-based signal process...

This wireless transponder recovers power and a reference clock from an incident RF signal and returns data on a 900MHz carrier. A multi-stage voltage multiplier/rectifier converts the received low power RF signal to a useful DC voltage and stores the energy on a storage capacitor. The injection locking technique facilitates power efficient generation of a low phase noise 900MHz internal clock f...

Radio Frequency (RF) fingerprinting is a security mechanism inspired by biological fingerprint identification systems. RF fingerprinting is proposed as a means of providing an additional layer of security for wireless devices. RF fingerprinting classification is performed by selecting an “unknown” signal from the pool, generating its RF fingerprint, and using a classifier to correlate the recei...

Direct-conversion receivers (DCRs), also known as zero-IF or homodyne receivers, have received significant attention over the last decade and have become a popular alternative to the classical heterodyne architecture (which has dominated receiver topologies for more than 70 years) in the development of RF integrated circuits (ICs) for wireless applications. Rather than downconverting to a finit...