There have been many investigations of mutual synchronization and multimode oscillation in coupled oscillators1)–4). Endo et al. have reported the multimode oscillations in various types of the coupled oscillators networks1). The synchronization phenomena in resistively coupled oscillators have been reported2)–4). In particular, we have reported synchronization phenomena observed from N oscilla...

A differential-voltage-controlled LC oscillator employs a gm-tuned technique instead of a varactor is presented, verified, and measured. The design was demonstrated in a standard 0.18m CMOS process. The oscillator can operate at the range of 4.73–5.05 GHz under a 1.8-V supply voltage. The measured phase noise is 100.76 dBc/Hz at 100-kHz frequency offset and 121.53 dBc/Hz at 1-MHz frequency offs...

A 65-GHz Class-C LC oscillator designed in 65nm CMOS technology by ST Microelectronics is presented. A three spiral transformer has been used to achieve low phase noise and low power consumption. Post-layout simulations show a phase noise is equal to -88.4 dBc/Hz at 1-MHz offset from the carrier (65.8 GHz). The power consumption is 14 mW with 1.2-V supply voltage. The oscillator is capable to o...

In this paper we propose new oscillator architecture (VCO2) and we compare it with a simple oscillator (VCO1). We describe the design and implementation of the differential LC-VCO for wireless applications. In this work we develop an analytical framework for determining the best VCO for a high-frequency synthesizer design based on the constraints of the application. We show methods for reducing...

Rotary traveling-wave oscillators (RTWOs) represent a new transmission-line approach to gigahertz-rate clock generation. Using the inherently stable LC characteristics of on-chip VLSI interconnect, the clock distribution network becomes a low-impedance distributed oscillator. The RTWO operates by creating a rotating traveling wave within a closed-loop differential transmission line. Distributed...

Digital RF transceiver architectures increasingly require quadrature (I/Q) local oscillator sinusoid generation, where the phasenoise and power consumption of the quadrature voltage controlled oscillator (QVCO) have a significant impact on the system performance. The relevance of VCO power consumption becomes even more urgent due to the demand for implementations of ultra-low power short-range ...

Previous investigations of noise in mutually synchronized coupled-oscillator systems are extended to include the effects of phase noise introduced by externally injected signals. The analysis is developed for arbitrarily coupled arrays and an arbitrary collection of coherent injected signals, and is illustrated with the specific case of linear chains of nearest neighbor coupled oscillators eith...

We have created a computational model of the timing network that paces the heartbeat of the medicinal leech, Hirudo medicinalis. The rhythmic activity of this network originates from two segmental oscillators located in the third and fourth midbody ganglia. In the intact nerve cord, these segmental oscillators are mutually entrained to the same cycle period. Although experiments have shown that...

Based on the self-biased current-reuse complementary structure and interposed network, a low power LC voltage controlled oscillator (VCO) is presented, which can simultaneously achieve ultra-low power consumption and low phase noise. Firstly, thanks to the self-biased voltage-diving technique, the LC-VCO consumes ultra-low power consumption. Secondly, the novel interposed network can greatly im...

We propose a dynamically coupled neural oscillator network for image segmentation. Instead of pair-wise coupling, an ensemble of oscillators coupled in a local region is used for grouping. We introduce a set of neighborhoods to generate dynamical coupling structures associated with a specific oscillator. Based on the proximity and similarity principles, two grouping rules are proposed to explic...