Abstract: An erythromycin A derivative represented by the formula (I): ##STR1## ?wherein R.sup.1 is a group represented by the formula: --OCOCH.sub.2 Y (wherein Y is a pyridyl group, a quinolyl group, a p-nitrophenyl group or a group represented by the formula: --NR.sup.4 R.sup.5 (wherein R.sup.4 and R.sup.5 may be the same or different, and are each a hydrogen atom, a methyl group, a pyridylmethyl, a quinolylmethyl group or a benzyloxycarbonyl group)) or a cladinosyloxy group, R.sup.2 is a hydrogen atom, or R.sup.1 and R.sup.2 together form an oxo group, R.sup.3 is a hydrogen atom, an acetyl group, an ethylsuccinyl group or a nicotinoyl group! or a pharmaceutically acceptable salt thereof has a strong antibacterial activity against not only Gram-positive bacteria but also some Gram-negative bacteria, in particular, Haemophilus influenzae which is a serious factor of infectious diseases in the respiratory organs.

Abstract: A radio telecommunication apparatus sends signals to a base station for a first period over radio channels established by a time division multiple access (TDMA) system. The apparatus has a battery whose voltage decreases in response to consumption of the battery. The apparatus measures the voltage of the battery only during a second period other than the first period and determines a remaining energy of the battery in response to the measured voltage.

Abstract: A radio telecommunication apparatus sends signals to a base station for a first period over radio channels established by a time division multiple access (TDMA) system. The apparatus has a battery whose voltage decreases in response to consumption of the battery. The apparatus measures the voltage of the battery only during a second period other than the first period and determines a remaining energy of the battery in response to the measured voltage.

Abstract: An adapter unit for adaptively supplying a portable radio unit with electric power is disclosed. When the portable radio unit being not powered by a rechargeable battery attached thereto or being not in a communication state is connected to the adapter unit, the first power supply circuit of the adapter unit supplies the rechargeable battery or the portable radio unit with power. When the portable radio unit being in the communication state is connected to the adapter unit, the second power supply circuit of the adapter unit supplies the portable radio unit through the rechargeable battery with power. Power supply capacity of the second power supply circuit is larger than that of the first power supply circuit.

Abstract: An adapter unit for adaptively supplying a portable radio unit with electric power is disclosed. When the portable radio unit being not powered by a rechargeable battery attached thereto or being not in a communication state is connected to the adapter unit, the first power supply circuit of the adapter unit supplies the rechargeable battery or the portable radio unit with power. When the portable radio unit being in the communication state is connected to the adapter unit, the second power supply circuit of the adapter unit supplies the portable radio unit through the rechargeable battery with power. Power supply capacity of the second power supply circuit is larger than that of the first power supply circuit.

Abstract: Disclosed is an apparatus for fixing inclined position of stand plates and the like, in which making a stand plate and the like possible to incline in an optional angle in all directions of 360.degree. and the fixing of an inclined position is made easy and tight. A movable plate 8 is interposed and inserted in a gap 9 provided between an upper plate 4 and a lower plate 5 of a stand frame 2. The center of a stand plate 16 is supported by a spherical joint 17 in tilting movement free on a main column 14 provided in standing state on the stand frame 2. A plurality of spiral shafts 19 hanged down from the back face of the stand plate 16 in conical rotation free are thrust into the stand plate 2 and penetrated through rubber bushes 13 fitted to the movable plate 8. A moving and fixing mechanism 22 for the movable plate 8 is provided at one side of the stand frame 2, with which one end of the movable plate 8 is engaged.

Abstract: A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation is inhibited when the radio telephone is in a talk mode. In more in detail, the ON or OFF state of the power source switch is detected as well as whether or not the apparatus is in the talk mode, so that the switching of a power source line switch to its OFF state by means of the power source switch is inhibited in the talk mode and allowed only in a non-talk mode. Further, an ON/OFF function of a power supply of the apparatus as well as, for example, a muting function which is necessary only in the talk mode and which acts to attenuate a transmission talk voice, are allocated to one of keys in a dial key pad.

Abstract: A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation is inhibited when the radio telephone is in a talk mode. In more detail, the ON or OFF state of the power source switch is detected as well as whether or not the apparatus is in the talk mode, so that the switching of a power source line switch to its OFF state by means of the power source switch is inhibited in the talk mode and allowed only in a non-talk mode. Further, an ON/OFF function of a power supply of the apparatus as well as, for example, a muting function which is necessary only in the talk mode and which acts to attenuate a transmission talk voice, are allocated to one of keys in a dial key pad.

Abstract: An electronic apparatus comprising a charger and an electronic device connected removably to the charger. The electronic device comprises a rechargeable battery unit charged by the charger when the charger is connected to the electronic device, an electronic unit having a plurality of operational modes in each of which a different operating current is required, a charger connection detector for detecting the connection of the charger to the electronic device, and a first control unit for calculating an appropriate current to be supplied from the charger, on the basis of an appropriate operating current value corresponding to the operational mode of the electronic unit and a specified charging current value for the battery unit, and informing the charger of the appropriate supplying current value when the charger connection detector detects that the charger is connected to the electronic device.

Abstract: A speech registration/recognition processing section is responsive to a speech input signal to be registered or recognized from a microphone to selectively subject the speech input signal to a registration or a recognition processing, in which upon the registration processing the speech input signal is allowed to be stored as recognition data and upon the recognition processing the speech input signal is compared to the recognition data stored. A speech record/reproduction processing section is responsive to the speech input signal from the microphone to subject the speech input signal to a record/reproduction processing, in which upon the record processing the speech input signal is recorded as a record signal and upon the reproduction processing the record signal is delivered as a reproduction signal. A speaker is supplied with the reproduction signal and the recognized information is provided to the user through this speaker.

Abstract: Improvements to a power supply backup circuit used to backup the operation of a radio device or the like when a power supply therefor is interrupted. A reverse current preventing diode is connected such that its anode is connected to the junction point of a DC power source and a voltage stabilizing circuit and such that its cathode is connected to the stabilizing circuit. A transistor is provided which has a collector connected to the cathode of the diode, an emitter connected to one end of a capacitor, the other end of which is grounded, and a base connected to a DC power source via a first resistor, and which has a second resistor connected across the base and emitter thereof. A third resistor is further connected across the collector and emitter of the transistor.

Abstract: A speech recognition system that detects a similarity between each speech pattern which has already been registered in the system and a speech pattern newly generated in response to the user's utterance made while the system is in a registration mode. The system further provides to the user in the registration mode information representing the detected similarity. The speech recognition system may be incorporated into a telephone apparatus or a radio telephone apparatus, in which a call origination may be automatically made in response to the user's utterance.

Abstract: Telephone apparatus in which a call may be made in response to utterances of a user by speech recognition without manually dialing a telephone number. The telephone apparatus includes a storage device for storing a set of parameters corresponding to an expected speech signal, which are used for recognizing the user's subsequent utterance and/or for indicating differences between the utterance and the stored signal. The telephone apparatus further includes a storage device for storing the speech signal so that the stored speech signal can be reproduced. The reproduced speech signal is used to confirm the stored speech signal. The stored speech signal may be reproduced in response to a user's key operation when the telephone apparatus is in a confirmation mode and in response to a user's utterance when the telephone apparatus is in a registration or voice calling mode.

Abstract: This invention discloses a voltage generator circuit having a voltage regulator and a voltage generator for supplying voltage to a load. The voltage regulator is powered by a power source which supplies a first voltage level and the voltage regulator provides a regulated output at a second voltage level lower than the first voltage level. The voltage generator receives power from the regulated output and provides a multiplied output having a third voltage level. Therefore, any level of voltage between the first voltage level and the third voltage level is available to the load circuit. Since the voltage regulator supplies the voltage generator with power at a regulated level, the voltage level applied to the muliplier may be adjusted for conserving power.

Abstract: An electronic volume device of a chopper type in which a switching control unit thereof can be composed of a monolithic integrated circuit and which controls a quantity of attenuation of an analog signal input to the device by switching the analog signal at predetermined periods. A comparator compares the volume control data generated by a volume control data generator and the counts of a counter which counts clocks having a predetermined period to output a signal indicative of the result of the comparison. This signal controls a tri-state buffer, the output of which is used to switch the input signal.

Abstract: A synchronizing signal separating circuit inverts and amplifies, in an inverter 12, a composite video signal received from a video amplifying circuit 100 through a coupling condenser 1. An output node B of the inverter 12 is connected to an input node A of the inverter 12 through a switch 14 and a bias resistor 10. A bias resistor 11 is connected between the input node A and a ground potential. An output of the inverter 12 is further inverted and amplified by an inverter 13 and outputted as a composite synchronizing signal and also supplied to a control input of the switch 14. As a result, the switch 14 is turned on in a synchronizing signal period, so that the coupling condenser 1 is charged with the output of the inverter 12 and also the electric charges of the coupling condenser 1 are discharged through the bias resistor 11 in other period than the synchronizing signal period.

Abstract: A digital television receiver capable of storing a desired television image information in response to an image storage instruction signal and reproducing the stored image information as a still image on the screen of a display tube (116) at any time as required. This digital television receiver comprises a control circuit (117', 122a) for writing desired image information in any of field memories (120a, 120b) in response to pressing of a memo key (128) of a remote controller (118), and a control circuit (117', 122b) for repeatedly reading out image information written in the field memories (120a, 120b) in response to pressing of a call key (129) of the remote controller (118) and supplying the information to a color matrix circuit (114).

Abstract: A voice recognizing telephone apparatus in which the telephone apparatus recognizes a speech input and stores the telephone numbers that correspond to the speech input. When the user makes an outgoing call to another telephone apparatus by speaking the telephone number corresponding to the other telephone apparatus, the telephone number is read out from stored telephone numbers and then is dialed. The stored telephone numbers can be erased entirely or partially. During operations of storing a telephone number into the memory, the voice recognizing telephone apparatus cannot make an outgoing call or receive an incoming call.

Abstract: A speech registration/recognition processing section is responsive to a speech input signal to be registered or recognized from a microphone to selectively subject the speech input signal to a registration or a recognition processing, in which upon the registration processing the speech input signal is allowed to be stored as recognition data and upon the recognition processing the speech input signal is compared to the recognition data stored. A speech record/reproduction processing section is responsive to the speech input signal from the microphone to subject the speech input signal to a record/reproduction processing, in which upon the record processing the speech input signal is recorded as a record signal and upon the reproduction processing the record signal is delivered as a reproduction signal. A speaker is supplied with the reproduction signal.

Abstract: A radio telephone apparatus power-supplied with a battery comprises a power supply control means for controlling the battery so as to terminate power supply if the apparatus is not operated for a predetermined time period. The apparatus further comprises means for informing at least a user of the termination of power supply prior to the power being turned off.