Nec Corp (Total 133 Patents Found)

A first pilot signal (18) is superimposed onto an input signal (1) thereto to distribute the signal as a first signal and a second signal to two destinations. The first signal is fed via an equalizer (24) to a main amplifier (4) for amplification thereof such that a second pilot signal (20) is mixed with the amplified ...
A selective calling receiver detects a message contained in the received selective calling signal and a message identification code given to this message. A counter counts the number of messages for each message identification code and generates the count value, and the messages and said count value are stored in a mem...
The present invention provides a solid electrolytic capacitor comprising a metal having a dielectric oxide film formed thereon, a conductive polymer compound layer formed on said dielectric oxide film, a conductive paste layer formed on said conductive polymer compound layer, a molded resin sheathing having all of the ...
Disclosed herein is a long wavelength multiple quantum well semiconductor laser which is capable of preventing the nonuniform injection of carriers into quantum wells, and the overflow of the electrons within the quantum wells, and which is also capable of suppressing the increase in the threshold caused by insufficien...
In order to transmit information data from a station to another station through a transmission channel, only the information data (a 31 to a 00 , b 31 to b 00 , etc) are transmitted when the channel has a good channel quality. When the channel quality is bad, error correction code words are composed for transmission ...
An antenna apparatus for a mobile unit capable of performing communication based on a plurality of types of digital cellular schemes using different frequencies includes at least two antennas (102,103). At least one (102) of the antennas is tuned to the transmission and reception bands in one digital cellular scheme, a...
A communication apparatus comprises a sound volume controller in which a speech signal is discriminated from background noise of a transmitting audio signal (Sat) and the sound volume control is performed when no speech signal is present in the transmitting audio signal. The sound volume controller comprises an averagi...
Electric field intensity of a signal corresponding to a plurality of receivers and received through antennas are converted into direct currents. The converted durect currents thus converted are fed to electric field level detection circuit. The electric field level detection means detects the electric field level on th...
A receiver of a carrier sense multiplexing connection method and an interference suppressing method thereof. In a broadband packet radio communication system characterized by the carrier sense multiple access method operated on a harsh frequency arrangement where an occupied band width of modulation transmission/recept...
A circuit for comparing first and second binary coded digital data signals has a plurality of first circuits each including first and second transistors of a P-channel type connected in series between a first potential terminal and a first output node. a plurality of second circuits each including third and fourth tran...
A light receiving device includes, in addition to a photodiode (3) and a reset element (1), a comparator formed by a first and a second MOS transistor (4,5) and a counter (6). The comparator compares an output potential (PDOUT) of the photodiode applied to a gate electrode of the first MOS transistor (4) with a thresho...
In a printing hammer which is for use in a printer head and comprises a piezoelectric actuator (17) coupled to a base member (16) by a resilient coupler (23), an arm (19) carrying a printing wire (26), and a first resilient hinge (21) coupling the piezoelectric actuator to the arm, first and second resilient parts (221...
@ A carry circuit used in an arithmetic unit, such as an adder, a subtractor, has to process a carry operation for producing a carry signal to be transferred to the following carry operation stage according to a carry signal transferred from the previous carry operation stage. To process carry operation at a high-speed...
A semiconductor laser having improved reliability. The laser contains an AIGalnP first cladding layer of a first conductivity type, an AIGalnP second cladding layer of a second conductivity type that forms a mesa stripe, an active layer made of an undoped GaInP layer, an undoped AlGaInP layer, or a quantum well layer o...
A via-structure of a multilayer interconnection ceramic substrate (2) for a multi-chip module, a semiconductor package and an insulating substrate has a high strength and a high reliability being produced at a low cost. A gap is provided at an interface between a via-conductor (1) and ceramics, and filled with a resin ...
A processor system comprises, in addition to a plurality of processors, a thread managing circuit which includes a load status table containing a corresponding number of load status counters each holding the load status of the corresponding processor. Each of the processor can access all the load status counters to kno...
57 A heterojunction semiconductor device has a plurality of ordered phase alloy layers (1). Either the whole or a part of each of the ordered phase alloy layers has a crystal structure (triple-period structure) in which the ordered alloy (11) is of a composition corresponding to the [111]A direction and an anion compos...