Abstract:
A jack having a jack case with an electrical contact switch adapted to be operated responsive to insertion and removal of a plug into and from the jack case along an insertion axis, the jack comprising: an insulating separator disposed with its longitudinal axis substantially parallel to the insertion axis, the separator having a projection at one end and the jack casing having a slot in one wall thereof for receiving the projection and enabling pivotal movement about the projection; and, the contact switch having a resilient contact piece which engages the other end of the separator and resilently positions the separator within the housing, such that upon plug insertion, the plug will engage an intermediate portion of the separator, thereby pivoting the separator, the separator engaging and moving the contact piece to operate the contact switch.
Abstract:
There is disclosed a variable-gain amplifier circuit that operates on a low voltage, exhibits low distortion, provides a wide range of variation, and is suitable for use in a low-power-consumption wireless communication system. The variable-gain amplifier circuit is configured so that a variable-load circuit, which includes three reactance function elements and provides a wide range of impedance variation, is connected to a conductor circuit whose output terminal generates a positive-phase output current proportional to conductance with respect to an input voltage.
Abstract:
The present invention is directed to provide a low-power-consumption wide-range RF signal processing unit having a small chip occupation area. A semiconductor integrated circuit has, on a semiconductor chip, a resonant circuit including a first capacitor having a capacitance which can be controlled by a first control signal of a first control terminal, and a gyrator for equivalently emulating an inductor by including a second capacitor having a capacitance which can be controlled by a second control signal of a second control terminal. The capacitance and the inductor form a parallel resonant circuit. At the time of changing parallel resonant frequency, the capacitances of the first and second capacitors are coordinately changed. The parallel resonant circuit is suitable for an active load which is connected to an output node of an amplifier.
Abstract:
The present invention provides a voltage-controlled oscillator operating from microwave frequencies to millimeter wave frequencies, which is capable of outputting a large power with an output impedance thereof being set up to a predetermined level at low power consumption, and a communication device using the same. The voltage-controlled oscillator includes: a differential alternating current generator including a resonator capable of varying resonant frequency according to an input control voltage, for generating a pair of differential alternating current each of which having the same frequency with the resonant frequency of the resonator yet being 180 degrees out of phase in mutual; a pair of transformers each of which having a primary inductor and a secondary inductor, for conducting the alternating current to the primary inductor; and an impedance-matching circuit connected to the secondary inductor of the transformers, wherein an output signal is outputted from the secondary inductors of the transformers.
Abstract:
In a variable frequency oscillator in a semiconductor device, as the variation of an oscillation frequency caused by the variation of temperature and supply voltage and process variation is large, it is difficult to reduce the conversion ratio of control voltage dependent upon phase noise and the oscillation frequency and therefore, phase noise is large. The variation of the oscillation frequency is suppressed and phase noise is reduced by connecting a voltage-to-current conversion circuit that converts input control voltage to control current of a ring oscillator to the ring oscillator where delay circuits a delay time of which increases and decreases according to the amplitude of input control current are cascade-connected by a plurality of stages in a ring and increasing/decreasing current dependent upon any of temperature, supply voltage and the threshold voltage of a transistor inside the voltage-to-current conversion circuit.
Abstract:
The capacitance of the capacitor with the constant capacitance is equivalently reduced in the capacitance of a resonant capacitor in a voltage control oscillator to increase the variable amount of the capacitance of the resonant capacitor, and to expand an oscillation frequency range. There are provided a differential negative conductance generator circuit having two resonation nodes for differential output, a differential resonant circuit having a variable capacitance that is controlled by voltage control and an inductance connected in parallel to each other, and a differential negative impedance circuit. A resonant circuit and a negative impedance circuit are connected between the resonation nodes. The capacitor with the constant capacitance that occurs between the resonation nodes is reduced by the negative impedance of the negative impedance circuit. The capacitor with the constant capacitance is represented by floating capacitors that occur between one of the resonation nodes and a ground potential and between the other resonation node and the ground potential, respectively.
Abstract:
The present invention is directed to provide a low-power-consumption wide-range RF signal processing unit having a small chip occupation area. A semiconductor integrated circuit has, on a semiconductor chip, a resonant circuit including a first capacitor having a capacitance which can be controlled by a first control signal of a first control terminal, and a gyrator for equivalently emulating an inductor by including a second capacitor having a capacitance which can be controlled by a second control signal of a second control terminal. The capacitance and the inductor form a parallel resonant circuit. At the time of changing parallel resonant frequency, the capacitances of the first and second capacitors are coordinately changed. The parallel resonant circuit is suitable for an active load which is connected to an output node of an amplifier.
Abstract:
A packaging laminate of the present invention is characterized in that it has at least a sealant layer (2), the sealant layer (2) being a film which comprises a linear ethylene/α-olefin copolymer, has a density of 0.925-0.935 g/cm3, and contains no additives, and that the linear ethylene/α-olefin copolymer is either a copolymer produced with a metallocene catalyst as a polymerization catalyst or a copolymer which has been obtained by subjecting a linear ethylene/α-olefin copolymer produced with a Ziegler catalyst as a polymerization catalyst to an operation for removing ionic impurities and in which contained ionic impurities have been reduced or removed. The packaging laminate has a significantly reduced content of ionic impurities such as metal ions and has a significant seal strength and excellent slip properties.
Abstract translation:本发明的包装层压体的特征在于,其至少具有密封剂层(2),密封剂层(2)为包含直链乙烯/α-烯烃共聚物的膜,密度为0.925-0.935g / cm 3,不含添加剂,线性乙烯/α-烯烃共聚物是由茂金属催化剂作为聚合催化剂制得的共聚物或共聚物,其通过使线性 用齐格勒催化剂制备的乙烯/α-烯烃共聚物作为聚合催化剂,用于去除离子杂质并且其中含有的离子杂质被还原或除去。 包装层压板具有显着降低的离子杂质如金属离子的含量,并且具有显着的密封强度和优异的滑动性能。
Abstract:
A frequency synthesizer comprises: a single-tone signal generator which outputs signals of a single frequency; a frequency multiplier which generates one or more intermediate signals having different frequencies based on frequencies of input signals and outputs the same as output signals; a frequency selector; a mixer; and a frequency synthesizer control circuit which includes a frequency synthesizer control terminal, wherein an output of the single-tone signal generator is set as an input of the frequency multiplier, one or more outputs of the frequency multiplier are set as one or more inputs of the frequency selector, an output of the frequency selector and one output of the outputs of the frequency multiplier are set as first and second inputs of the mixer, and an output of the mixer is set as an output of the frequency synthesizer.