Abstract: An envelope tracking power supply circuit is a power supply circuit for generating an output voltage according to the envelope of a high frequency signal and includes a voltage follower circuit for receiving an envelope signal and outputting a voltage according to the envelope signal; two parallel resistors connected in parallel between the output of the voltage follower circuit and an output terminal; hysteresis comparators for detecting respective voltage drops in the parallel resistors and generating voltages according to the voltage drops; and switching converters for performing switching according to the respective voltages outputted from the hysteresis comparators and outputting a voltage to the output terminal.

Abstract: The present invention provides a positive pressure chamber for treating extremities, which is used for treating extremity swelling or edema, rehabilitation, prophylaxis for deep venous thrombosis, relieving extremity pain, improvement of extremity skin, and the like.

Abstract: An external fixator for fixing bones includes a coupling member, a plurality of ball joints, each ball joint comprising a pin to be inserted into a bone, a rotary member in form of a ball, a supporting member in which a first supporting member and a first thread for supporting the ball rotatably are formed, and a tubular fastening member that contains the ball and that has openings at the opposite ends, the tubular fastening member is provided at one end with a second thread corresponding to the first thread. The tubular fastening member is provided at the other end with a second supporting portion for pushing the ball against the first supporting portion when the second screw is driven into the first thread, wherein the pins and the coupling member are fixed to the supporting member and the rotary member.

Abstract: The present invention aims at providing a novel indocyanine compound solving problems of conventionally used indocyanine green, such as solubility in water or physiological saline, a synthesis method and a purification method thereof, and a diagnostic composition including the novel indocyanine compound. Further, provided are a method for evaluating biokinetics of the novel indocyanine compound and a device for measuring biokinetics, and a method and a device for visualizing circulation of fluid such as blood in a living body, which utilize the diagnostic composition. Also, found are a novel indocyanine compound in which a hydrophobic moiety in a near-infrared fluorescent indocyanine molecule is included in a cavity of a cyclic sugar chain cyclodextrin to cover the hydrophobic moiety in the indocyanine molecule with the glucose, and a synthesis method and a purification method thereof.

Abstract: A nerve dysfunction repairing material including a hydrogel of a polysaccharide derivative that has, in a 0.5 wt % aqueous solution, a complex modulus of 1 to 1000 N/m2 and a loss factor of 0.01 to 2.0 as measured at an angular velocity of 10 rad/sec using a dynamic viscoelasticity measuring apparatus. The nerve dysfunction repairing material can be a hydrogel injectable through a syringe, has excellent retention in the body, and has a restorative effect on the function of damaged or degenerated nerves.

Abstract: The present invention relates to a directional coupler 1 structured with a microstripline 20 including a main line 2 having an input port P1 and an output port P2, and a sub line 3 having a coupling port P3 and an isolation port P4. The sub line 3 is made of a high impedance line 4 narrower than the main line 2. The high impedance line 4 has first coupling lines 5A and 5B and a second coupling line 6 each extending in parallel to the main line 2. The distance between the first coupling lines 5A and 5B and the main line 2 is smaller than the distance between the second coupling line 6 and the main line 2.

Abstract: The invention aims to maintain a high efficiency even for a high-frequency signal having a wideband envelope. The envelope tracking power supply circuit 5 is a power supply circuit for generating an output voltage according to the envelope of a high frequency signal and comprises a voltage follower circuit 7 for receiving an envelope signal and outputting a voltage according to the envelope signal SE; two parallel resistors Rsense connected in parallel between the output of the voltage follower circuit 7 and an output terminal PO; hysteresis comparators 9a, 9b for detecting respective voltage drops in the parallel resistors Rsense and generating voltages according to the voltage drops; and switching converters 11a, 11b for performing switching according to the respective voltages outputted from the hysteresis comparators 9a, 9b and outputting a voltage to the output terminal PO.

Abstract: A bone filling material prepared from both a cement material for bone filling and a crimpled fibrous material, which is filled into an affected part in such a state that the crimpled fibrous material is dispersed in a cement base material consisting of the above cement material. It is preferable that the cement material contain calcium phosphate cement and the crimpled fibrous material have a mean diameter of 10 to 500 ?m.

Abstract: The present invention provides a positive pressure chamber for treating extremities, which is used for treating extremity swelling or edema, rehabilitation, prophylaxis for deep venous thrombosis, relieving extremity pain, improvement of extremity skin, and the like.

Abstract: A work for fixing a bone by an external fixator is facilitated. The external fixator comprises a plurality of ball joints each comprising a plurality of pins inserted into a bone, a coupling member, a rotary member that fixes pins to the coupling member relatively, is coupled by the coupling member and forms a ball at least partially, a supporting member in which a first supporting member and a first screw for supporting the ball rotatably are formed, and a tubular fastening member that contains the ball, has openings at the opposite ends, is provided at one end with a second screw corresponding to the first screw, and is provided at the other end with a second supporting portion for pushing the ball against the first supporting portion when the second screw is driven into the first screw, wherein the pins and the coupling member are fixed to the supporting member and the rotary member.

Abstract: There is provided an elastin molded article having flexibility, a biological absorption property and tear strength which is practically suturable by using a fiber structure comprising aliphatic polyester fibers having an average fiber diameter of 0.05 to 50 ?m as a supporting base material. The elastin molded article is useful as a raw material for a tube or artificial blood vessel to be implanted in a body that has a biological absorption property and has tear strength and flexibility which allow the tube or artificial blood vessel to endure suture at the time of operation or the like.

Abstract: An FM audio system has an FM tuner, a CD player, a stereo modulator for modulating an audio signal from the CD player to produce a composite signal so as to be received by the FM tuner for reproducing the audio signal. A control circuit such as an automatic level controller is provided for controlling a level of the audio signal applied to the stereo modulator to such a level as to prevent tone quality of sound reproduced by the FM tuner from deteriorating.

Abstract: An FM audio system has an FM tuner, a CD player, a stereo modulator for modulating an audio signal from the CD player to produce a composite signal so as to be received by the FM tuner, for reproducing the audio signal. A notification system has a controller and a muting circuit. The controller produces a control signal in response to the changing of function of the CD player. The muting circuit attenuates the audio signal from CD player in accordance with the control signal. Speech information is generated in response to the changing of the function of the CD player. The speech information is added to an attenuated audio signal and applied to the stereo modulator so as to reproduce the audio signal together with the speech information.

Abstract: A muting circuit for an AM stereophonic receiver of the type that having a detector circuit operating upon an AM stereophonic signal, the carrier of which is phase-modulated by the difference signal of first and second stereo channel signals, for detecting the difference signal. The muting circuit includes a muting signal generating circuit for detecting the output level of the detector circuit exceeding a predetermined value and for generating a muting signal at least for periods when the predetermined value is exceeded, and a muting switch circuit for attenuating the output of the detector in response to the muting signal.

Abstract: A PLL detection circuit for use in an AM-PM type AM stereo receiver in which unwanted AC signal components included in the output of a phase comparator are suppressed by switching the frequency response characteristic of a loop filter in the PLL detection circuit as locking is reached so that only the DC signal component, corresponding to the phase difference of the input signal and a reference signal, is outputted. A changeover circuit, including a switching circuit composed of a pair of parallel-connected transistors, is connected in parallel with an element of the loop filter, the component value of which affects or is at least partially determinative of the frequency response characteristic of the loop filter. The changeover circuit is activated by a control signal indicative of the locking state of the PLL detection circuit.

Abstract: An AM detector circuit capable of performing an AGC function having a wide dynamic range and low level of distortion and spurious interference. A first differential amplifier receives an amplitude-modulated signal to be detected as differential inputs. Outputs of the first differential amplifier are connected as constant current source inputs to second and third differential amplifiers. The differential inputs of the second and third differential amplifiers are fed with a signal synchronous with the carrier wave of the amplitude-modulated signal. Outputs of the second and third differential amplifiers are interconnected to provide multiplication outputs representing the product of the amplitude-modulated signal and its carrier wave. The detector AM signal is passed through a low-pass filter and then through a fourth differential amplifier to a current mirror circuit.

Abstract: A multi-function sound system including an AM stereophonic receiving function in which interference with operating circuits in modes other than the AM stereophonic mode is eliminated. A limiter receives a IF AM stereophonic received signal and removes the amplitude variation components therefrom and couples the resulting signal to a phase detector composed of a phase-locked loop which produces as an output signal a sub-signal. A switch is provided which deactivates both the limiter and the voltage-controlled oscillator in the phase-locked loop circuit when the sound system is set to other than the AM stereophonic receiving mode.

Abstract: A time constant resistor in a phase lock loop filter is short-circuited by a plurality of diodes which are activated in response to a detection output indicating that the filter output is within a desired locking range.

Abstract: An AM stereophonic receiver including a stereophonic pilot signal eliminating circuit which substantially completely eliminates a pilot signal in an input stage of a matrix detector. A received AM stereophonic signal, of the type in which the carrier signal is phase-modulated with a sub-signal and amplitude modulated by a main signal, is coupled to a main signal detector and a sub-signal detector. The output of the sub-signal detector is coupled through a band amplifier which produces as an output a signal corresponding to the pilot signal contained in the stereophonic signal. The outputs of the sub-signal detector and main signal detector are coupled to inputs of adder/subtractor circuit in a matrix detector while the output of the band amplifier is also coupled thereto in a phase so as to cancel the pilot signal contained in the output of the sub-signal detector.

Abstract: A detector for a modulated AM stereophonic signal of simple configuration in which the sub signal of the stereophonic signal is detected accurately independent of fluctuations in the frequency of the carrier signal. In the detector circuit, the output phase of a VCO in a PLL circuit which is fed with an amplitude limited signal corresponding to the output of an IF amplifier in the receiver is controlled by a variable phase shifter that performs phase shifting according to a control voltage. The phase-controlled output is used as a synchronous detection signal for sub signal detection. The control voltage is produced to correspond to the phase difference between the phase-controlled signal and the carrier signal of the received AM stereophonic signal.