Fujitsu Media Devices Limited

Alejandro Puel

Toshimasa Numata

Nobuaki Matsuo

Patricio Dauguet

Nobuaki Matuo

Xinghui Cai

An oscillator includes a first oscillating portion that outputs a first oscillation signal having a first oscillation frequency through a first intermediate node to an output terminal, a mounting portion that includes an insulating layer and that mounts the first oscillating portion, a first line provided in the insulating layer and coupled between the first intermediate node and ground, a second line provided in the insulating layer and coupled between the first intermediate node and a power supply terminal, and a third line provided in the insulating layer and coupled between the first intermediate node and the output terminal.

Oscillator

An oscillator includes: oscillation units (throughn) outputting oscillation signals of different frequencies; a transmission line () to which outputs of the oscillation units () are connected, the transmission line having a characteristic impedance corresponding to an output impedance of an output terminal (Tout); and a low-pass filter) connected between the transmission line () and the output terminal.

Oscillator for outputting different oscillation frequencies

The present invention is an oscillator including: first transistors outputting oscillation signals of different oscillation frequencies to collectors; a common node to which outputs of emitters of the first transistors are connected and input; a feedback circuit feeding an output of the common node to bases of the first transistors; and isolation circuits that are respectively provided between the emitters of the first transistors and the common node and cut off high frequency components from the common node.

Oscillator having multiple oscillation units

The present invention is an oscillator including: a first resonance circuit including a first variable capacitance diode having a cathode connected to a control terminal, a first capacitor and a first inductor connected between an anode of the first variable capacitance diode and ground; a second resonance circuit including a second variable capacitance diode having a cathode connected to the control terminal, a second capacitor and a second inductor connected between an anode of the second variable capacitance diode and ground; and an oscillation circuit coupled to the first and second resonance circuits and outputting an oscillation output.

Voltage controlled oscillator

An oscillator includes a resonance circuit, and a feedback circuit coupled to the resonance circuit. The resonance circuit includes a main resonance element circuit, and a voltage dividing circuit that divides an output voltage of the main resonance element circuit and applies a divided voltage to the feedback circuit.

Oscillator having voltage dividing circuit

An oscillator includes a resonant circuit generating a resonant signal, a drive circuit that feeds back the resonant signal to the resonant circuit, and an output terminal connected to a given node of the resonant circuit, an oscillation signal of the oscillator being output via the output terminal.

Oscillator having a resonant circuit and a drive circuit

An oscillator includes a transistor having a collector receiving a power supply voltage, a first capacitor connected between a base and an emitter of the transistor, a second capacitor connected between the first capacitor and ground, a resistor connected between the collector and base of the transistor, a first inductor connected between the base of the transistor and ground, and a second inductor connected to the emitter of the transistor and the first inductor.

A voltage control oscillator used in mobile communication systems such as cellular phones and video machines. An oscillation output of the first output oscillation circuits ( ) enters a broad band buffer amplifier circuit ( ) through a stage-to-stage coupling capacitor ( ) and an oscillation output of the second output oscillation circuit ( ) enters the broad band buffer amplifier circuit ( ) through frequency selective filters ( ) and the stage-to-stage coupling capacitor ( ). On/off operation of a control voltage of a switch terminal ( ) installed on the first or second output oscillation circuit outputs selectively an oscillation signal from the first or second output oscillation circuit.

Growing community of inventors

San Jose, CA, United States of America

Alejandro Puel