Seiko Epson Corporation

Kabushiki Kaisha Suwa Seikosha

Nippon Kogaku K.k.

Epson Corporation

Masayuki Ikeda

Tadashi Aizawa

Ignasi Cairo

Diego Mateo Pena

Hiroaki Tateno

Enrique Barajas Ojeda

Junichi Kobayashi

Shogo Samejima

Jose Luis Gonzalez Jimenez

Takahiro Naka

Hiroshi Wakabayashi

Takema Yamazaki

Minoru Hosokawa

Kenji Aoki

Satoru Yazawa

Fumito Obikawa

Hidetoshi Komatsu

Mitsuhiro Gotho

An electronic apparatus includes a display; and an antenna including a first element without power feeding that is a structural component made of metal and is disposed on the display or above a display surface of the display in a display direction, a second element which is disposed below the first element and is connected to a power supply, and a GND plate that is disposed below the second element, wherein the first element and the second element are electromagnetically coupled.

Electronic apparatus

An antenna includes a magnetic current element which is an element to constitute a loop and generates a magnetic current vector having a component perpendicular to a loop plane, and an electric current element to generate an electric current vector having a component parallel to the magnetic current vector.

Antenna and electronic apparatus

A small electronic device enables improving transmission and reception performance with stable operation. An example of the electronic device is an electronic wristwatch having a display; a circuit board disposed on one side of the display; an antenna is disposed on the opposite side of the circuit board as the display, and includes a dielectric layer, a ground conductor disposed on one side of the dielectric layer, and a radiating conductor disposed on the other side of the dielectric layer. The ground conductor is disposed on the surface of the dielectric layer on the side near the circuit board, and is connected to the ground potential of the circuit board. The radiating conductor is disposed on the surface of the dielectric layer on the side far from the circuit board, and is connected to the signal potential of the circuit board.

Electronic device with antenna

In an electronic apparatus which is equipped with a first transmission unit for performing a first communication by an electromagnetic wave; a second transmission unit for performing a second communication by an electromagnetic wave; and a reception unit for receiving a signal transmitted from the second transmission unit, the electronic apparatus is comprised of an antenna arranged by a radiator having a size which is smaller than 1/(2&#x3c0;) of a wavelength of a use electromagnetic wave, which is connected to at least the second transmission unit and the reception unit.

Electronic apparatus and wireless communication terminal

An electronic circuit includes: a circuit generating first and second balanced differential input signals; a first envelope detection circuit including a first output terminal and first and second input terminals receiving the first and second input signals, respectively, via first and second impedance elements, respectively, and outputs from the first output terminal a first output signal that is the sum of the squares of the first and second input signals; a second envelope detection circuit including a second output terminal and third and fourth input terminals receiving the first and second input signals, respectively, via third and fourth impedance elements, respectively, and outputs from the second output terminal a second output signal that is twice the value obtained by squaring the average of the first and second input signals; and a differential circuit generating a differential signal from the first and second output signals.

Electronic circuit and electronic device

A pulse generation circuit for outputting a pulse with a predetermined waveform to an output terminal in response to a start signal includes a circuit adapted to generate a plurality of signals {Di|i denotes an integer in a predetermined range}, which has predetermined amounts of time differences from the start signal, based on the start signal, a plurality of power supplies {Ej|j denotes an integer} adopted to supply electric energy of a predetermined electric quantity, and a switching circuit adapted to sequentially switch the power supplies {Ej} in a predetermined order in accordance with logical function values of at least a part of the signals {Di} to connect the power supplies {Ej} to the output terminal.

Pulse generation circuit and UWB communication device

A pulse generator circuit that outputs pulses having a predetermined shape from an output terminal based on a start signal includes a timing generator circuit that generates (n+1) signals (n is an integer greater than or equal to 2), the phases of which sequentially change at predetermined time intervals from the point when the phase of the start signal changes, first and second power supplies that supply predetermined potentials, n impedance devices, and a switching circuit that connects the output terminal to the first or second power supply in a predetermined order according to the value of a logic function based on the (n+1) signals via the corresponding impedance device.

Pulse generator circuit and communication apparatus

A pulse generator circuit that outputs pulses having a predetermined shape from an output terminal based on a start signal includes a timing generator circuit that generates (n) signals (n is an integer greater than or equal to 2), a pulse width signal generator circuit that generates a first pulse width signal and a second pulse width signal a first filter circuit limiting the band of the first pulse width signal, a second filter circuit limiting the band of the second pulse width signal, first and second power supplies, a first variable impedance circuit controlled by the first filter circuit, a second variable impedance circuit controlled by the second filter circuit, and a switching circuit that alternately connects the output terminal to the first power supply using a logic function value based on at least part of the n signals.

An electronic circuit includes: a first amplifying circuit to which a first input signal is inputted; a second amplifying circuit to which a second input signal is inputted; a first drain ground amplifying transistor provided between a first power source node and an output node with control over the gate by the output from the first amplifying circuit; a second drain ground amplifying transistor provided between the first power source node and the output node with control over the gate by the output from the second amplifying circuit; a common load element provided between the output node and a second power source node; a first negative feedback path for negative feedback from the output node to the input of the first amplifying circuit; and a second negative feedback path for negative feedback from the output node to the input of the second amplifying circuit.

A mixer circuit includes a grounded-gate amplifier disposed between an input node and a first node, and first through nth (n denotes an integer equal to or greater than 1) series transistor rows disposed between the first node and a second node, each of the first through nth series transistor rows includes two or more transistors coupled in series between the first node and the second node, and the transistors constituting the first through nth series transistor rows are controlled by first through mth (m denotes an integer equal to or greater than 2) control signals.

Mixer circuit, communication device, and electronic equipment

A pulse generation circuit for outputting to an output terminal (OT) includes an inverter delay circuit (IDC) for processing a start signal with a predetermined delay; a first switching circuit (SC) adapted to connect the OT to a first voltage when a logical product of the IDC is true, and to connect the OT to a second voltage when a logical sum of the IDC is false; a second SC adapted to connect the OT to the first voltage when a logical product of the IDC is true, and to connect the OT to the second voltage when a logical sum of the IDC is false; and a start signal control circuit adapted to input the start signal to the IDC with a delay when the first SC is activated, and to input the start signal to the IDC without the delay when the second SC is activated.

The pulse generator comprises: a delay line arranged to receive a digital input signal and to produce a plurality of delay line output signals; first and second pulse generator blocks comprising logic circuitry arranged to generate a plurality of successive first output pulses in response to said different delay line output signals; and pulse combiner circuitry arranged to combine said first output pulses to produce second output pulses. The first pulse generator block is arranged to be responsive to rising edges of said input signal, and the second pulse generator blocks is responsive to falling edges of said input signal. Thus, both rising and falling edges of said input signal are used to create pulses. The device can be used in impulse radio transmitters and receivers.

Growing community of inventors

Shiojiri, Japan

Masayuki Ikeda