Time filter

Source Type

Paterson, NJ, United States

Rohde U.L.,Synergy Microwave Corporation
IEEE Microwave Magazine | Year: 2011

For large-signal operation of oscillators, it is typically necessary to obtain the large signal device parameters of the active two-port network and calculate the external feedback elements for the circuit [1]-[16]. Figure 1 shows the simplified circuit diagram for a series feedback oscillator comprising the intrinsic transistor, its package parasitics, and the external feedback circuit. Both series and parallel feedback arrangements are common in oscillator circuits [9]. The circuit example shown below is based on the series feedback circuit and accounts for all intrinsic parasitic parameters [7]-[9]. © 2011 IEEE.

Pardo C.,Synergy Microwave Corporation
Microwaves and RF | Year: 2015

These synthesized signal sources are available in single- and dual-loop configurations for low-noise output signals to 15 GHz.

Poddar A.K.,Synergy Microwave Corporation | Rohde U.L.,Ludwig Maximilians University of Munich
IEEE Microwave Magazine | Year: 2012

Ajay K. Poddar and Ulrich L. Rohde discuss about the latest technology, the challenges in implementing them, and market trends for frequency generating and timing devices. They predict that the second and third generation of MEMS oscillators will target a larger market for compact oscillators in order to meet temperature-compensated crystal oscillator (TCXO) and oven-controlled timing modules (OCXO) performance requirements. While silicon-based timing devices are still not as capable as crystal oscillators of undertaking sophisticated tasks , they are getting better, and will eventually replace crystals in many contexts. There is a possibility that MEMS-based oscillators fill the application gap between high-performance non-CMOS-compatible quartz technology on the one hand, and low performance CMOS compatible LC oscillators on the other. It is concluded that, the current steady, moderate growth in timing solutions revenue is being driven by the expansion of strong consumer electronics and computer applications sectors, and because silicon timing solutions are improving.

The present invention details fabrication guidelines of integrated optoelectronic oscillators with frequency and phase stability, having higher frequency selectivity in a relatively small size (compared to the larger size of a higher order electrically realized RF filter), reduced temperature sensitivity, and minimized frequency drift. The integrated photonic components and RF oscillator may use Silicon photonics and microelectronic integration using CMOS and BiCMOS technology, eliminating the need for bulky and/or discrete optical and microwave components.

Synergy Microwave Corporation | Date: 2015-04-07

The present disclosure is directed a metamaterial circuit may further be coupled to a mbius strip resonator or a substrate integrated waveguide. The disclosure is also directed to a device having a tuning circuit and a metamaterial resonator operatively coupled to the tuning circuit. The metamaterial resonator operatively coupled to the tuning circuit may likewise be coupled to a mbius strip resonator or a substrate integrated waveguide.

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