Abstract:
A variable operational mode transceiver device formed with an integrated circuit having a semiconductor material substrate supporting a feedback oscillator having a signal power divider electrically coupled to said feedback oscillator output, and a signal frequency multiplier electrically coupled to said signal power divider. A signal mixer has a pair of inputs of which one is electrically coupled to that remaining one of said pair of outputs of said signal power divider.
Abstract:
An integrated voltage controlled oscillator is provided. The integrated voltage controlled oscillator includes a first slab inductor having two ends and a second slab inductor having two ends. A first oscillator core is connected to a first end of the first slab inductor and a second end of the second slab inductor, and a second oscillator core is connected to a second end of the first slab inductor and a first end of the second slab inductor. In this manner, the low-loss slab inductors provide the oscillator tank inductance.
Abstract:
Techniques and structures for tunign integrated, distributed voltage-controlled oscillators (DVCO'S) across a wide microwave frequency range are disclosed. One type of DVCO implements a tunign circuit that includes a pair of interconnected amplifying transistors and a current source connected to the transistors, such that a differential voltage input to the circuit adjusts the current to eact transistor and effectively adjusts the "eletrical lenght" of one of the transmission lines on which the output frequency is oscillating. This, in turn, adjusts the time delay and thus frequency of the signal propagating on the lines across a wide frequency band. This technique is called "current-steering." In a preferred embodiment, the tuning circuit is balanced with a complementary tuning circuit to effectively adjust the electrical lenght of the second transmission line in the oscillator. In another technique that provides for more coarse, but wider range, broadban frequency tuning, the time delay, and thus frequency, of the DVCO is adjustable by varying the capacitive loading on the transmission lines, by introducing a coupling capacitor between the transmission lines and tuning the intrinsic capacitances of the gain transistors with a dc bias input.
Abstract:
It is disclosed a microwave VCO implemented in planar way technique on the same standard glass reinforced FR4 substrate supporting the layout of the relevant control circuit (in particular, locking circuits and bias circuits) operating at a well lower frequency. The area occupied by the VCO on the standard glass reinforced FR4 substrate is very small, minimizing by this the power loss of the microwave oscillation during its propagation. To this purpose, the varactor is placed in close contact with the active element (GaAsFET) of the VCO, which therefore does not include the traditional resonant cavity. The use of stubs in critical points of the circuit prevents the loss of power otherwise introduced by impedance mismatch. Through these measures, the VCO oscillation frequency can be driven up to 18 GHz, without altering by that the operation characteristics of the same at a significant extent. Moreover, since the Applicant has not recorded a significant electromagnetic interference in the substrate areas, close to the VCO, it does not require as well appropriate shielding means. Thanks to the invention, it is thus possible to use the same manufacturing process to obtain both the VCO layout and the layout of the above mentioned low frequency.
Abstract:
The invention relates to a microwave pulse generator for generating microwave pulses with nanosecond pulse duration, comprising a pulse generator generating control pulses of a constant pulse width and a microwave oscillator generating microwave oscillations. The microwave oscillator is fitted with a transistor amplifier, to which a frequency-determining resonant circuit and an ohmic device for reducing the resonant circuit sharpness are connected in such a way that a control pulse of the pulse generator guided to the transistor amplifier on an input binder leads to a tappable microwave oscillation on an output binder of the microwave oscillator, which follows at least approximately the trajectory of the control pulse.
Abstract:
Dans un dispositif à radar Doppler pour la surveillance locale, l'oscillateur constitue en même temps le détecteur. Il contient un transistor à effet de champ, muni dans son circuit de source et de drain d'un élément de circuit pour le prélèvement des signaux de fréquence Doppler, connecté par l'intermédiaire d'un filtre. On obtient ainsi un dispositif particulièrement simple et de fabrication avantageuse, peu volumineux, léger et d'une fiabilité élevée.
Abstract:
A plurality of inductance enhanced interleaved rotary traveling wave oscillators (RTWOs) is disclosed. Portions of the transmission line conductors are increased in length and run in parallel. Because the currents in these portions travel in the same direction, the inductance of these inductors is increased. By controlling the length of the transmission line conductors in these areas compared to the lengths where the currents in the oscillators travel in opposite directions, the overall impedance of the oscillators can be increased. Increased impedance leads to lower power and lower phase noise for the oscillators. Additionally, the interleaved oscillators are phase-locked to each other.
Abstract:
Die Erfindung betrifft eine Vorrichtung zur Bestimmung oder Überwachung des Füllstandes (F) eines Füllguts (2) in einem Behälter (1) mit einem hochfrequente Messsignale erzeugenden Hochfrequenzoszillator (32), mit einer Ein-/Auskoppeleinheit (34), mit einer Antenne (10), wobei die Antenne (10) die über die Ein-/Auskoppeleinheit (34) eingekoppelten Messsignale (Sx) in Richtung der Oberfläche (3) des Füllguts (2) aussendet bzw. die an der Oberfläche (3) des Füllguts (2) reflektierten Messsignale (Rx) empfängt, und mit einer Auswerteschaltung (35), der die an der Oberfläche (3) des Füllguts (2) reflektierten Messsignale (Rx) zugeleitet werden und die den Füllstand (F) in dem Behälter (1) über ein Laufzeitdifferenzverfahren ermittelt. Dem Hochfrequenzoszillator (32) sind ein Transistor (12) mit Sourcezweig (S), Drainzweig (D) und Gatezweig (G), zumindest eine frequenzeinstellende Komponente (18) und zumindest eine frequenzbestimmende Komponente (17) zugeordnet. Die frequenzbestimmende Komponente (17) des Hochfrequenzoszillators (32) ist erfindungsgemäß im Sourcezweig (S) des Transistors (12) angeordnet.
Abstract:
In a self injection locked voltage controlled oscillator arrangement (1), a pair of coupled first and second voltage controlled oscillator devices (21,22) are arranged on a chip (2), an amplifier device (23) is arranged on the same of the refection type chip (2), and an off-chip delay line (10) is arranged with one terminal connected to an output terminal of the coupled first and second voltage controlled oscillator devices (821,22), and on terminal adapted to reflect a signal from the output terminal, the amplifier device (23) being arranged to amplify an injection signal from said output terminal and to supply the amplified injection signal to one of said first and second voltage controlled oscillation devices (21,22) to provide a VCO arrangement (1) that exhibits low phase noise and a small size.
Abstract:
An inductance enhanced rotary traveling wave oscillator is disclosed. Portions of the transmission line conductors are increased in length and run in parallel. Because the currents in these portions travel in the same direction, the inductance of these inductors is increased. By controlling the length of the transmission line conductors in these areas compared to the lengths in which the currents travel in opposite directions, the overall impedance of the oscillator can be increased. Increased impedance leads to lower power, higher Q, and lower phase noise for the oscillator. Additionally, the folded nature of the transmission line conductors permits a longer length of transmission line conductors to be routed in a smaller area. The folded nature also permits placement of the devices to take into account their switching delays. A folded circular version of the oscillator is possible, leading to improved access to phase taps on the oscillator.