Abstract: A road antenna apparatus includes a road antenna 104 which is mounted on a post 103 and at an elevated position on a road R and via a radio wave establishes radio communication with an on-vehicle radio device 102 mounted in a vehicle 101 which is traveling over the road; and a determining device provided in the antenna and determining whether the travel speed of the vehicle is appropriate for a speed limit imposed on a road, on the basis of the travel speed of the vehicle based on a signal corresponding to a reflected wave, the reflected wave being produced as a result of the radio wave emitted from the antenna being reflected by the vehicle.

Abstract: A terminal apparatus for enabling the use of the Internet connection line. The terminal apparatus reads out the phone number of a first server and data for starting communication with the first server from an IC card mounted in the IC card socket, calls the phone number, and transmits the data in response to the demand from the first server. Moreover, the terminal apparatus receives the setting input by the setting acceptance screen for accepting the application for using the Internet connection line received from the first server, transmits the content to the first server, thereafter, demands the confirmation operation in response to the demand from the first server, and when it receives the confirmation input, advises the same. Furthermore, the terminal apparatus receives advice of the phone number of a second server, and the user ID and the password for starting communication with the second server from the first server, and stores the same in the IC card.

Abstract: While a spectrum waveform of an output signal from a subtracter (207) is visibly monitored, an operator controls a variable phases shifter (208) based upon a second control signal (CL2) so that a shape of a spectrum waveform of an output signal from a subtracter (207) is approximated to a spectrum waveform of a desirable wave to change a phase of a local oscillation frequency signal from a local oscillator (206). As a result, a phase of a duplicated loop signal is changed. Also, the operator controls a variable attenuator (209) based upon a first control signal (CL1) so that a shape of this spectrum waveform is approximated to a spectrum waveform of a desirable wave (20) to change a signal level of the duplicated loop signal.

Abstract: A road antenna apparatus includes a road antenna 104 which is mounted on a post 103 and at an elevated position on a road R and establishes radio communication with an on-vehicle radio device 102 mounted in a vehicle 101 which is traveling over the road; and a laser-beam emitting device 111 which is mounted on the road antenna and radiates a laser beam onto a predetermined position 113 on the surface of the road. An offset in the angle at which a road antenna is mounted can be readily ascertained on the basis of a distance between a predetermined position on the surface of the road and a position 114 on the road surface onto which a laser beam is actually radiated.

Abstract: A road antenna apparatus includes a road antenna 104 which is mounted on a post 103 and at an elevated position on a road R and establishes radio communication with an on-vehicle radio device 102 mounted in a vehicle 101 which is traveling over the road; and a laser-beam emitting device 111 which is mounted on the road antenna and radiates a laser beam onto a predetermined position 113 on the surface of the road. An offset in the angle at which a road antenna is mounted can be readily ascertained on the basis of a distance between a predetermined position on the surface of the road and a position 114 on the road surface onto which a laser beam is actually radiated.

Abstract: A road antenna apparatus includes a road antenna 104 which is mounted on a post 103 and at an elevated position on a road R and establishes radio communication with an on-vehicle radio device 102 mounted in a vehicle 101 which is traveling over the road; and a laser-beam emitting device 111 which is mounted on the road antenna and radiates a laser beam onto a predetermined position 113 on the surface of the road. An offset in the angle at which a road antenna is mounted can be readily ascertained on the basis of a distance between a predetermined position on the surface of the road and a position 114 on the road surface onto which a laser beam is actually radiated.

Abstract: A road antenna apparatus includes a road antenna 104 which is mounted on a post 103 and at an elevated position on a road R and establishes radio communication with an on-vehicle radio device 102 mounted in a vehicle 101 which is traveling over the road; and a laser-beam emitting device 111 which is mounted on the road antenna and radiates a laser beam onto a predetermined position 113 on the surface of the road. An offset in the angle at which a road antenna is mounted can be readily ascertained on the basis of a distance between a predetermined position on the surface of the road and a position 114 on the road surface onto which a laser beam is actually radiated.

Abstract: A receiving apparatus is disclosed which comprises: a receiving circuit for receiving time-division-duplexed first and second radio wave paging signals, having the same carrier frequency, including first and second data having different first and second data rates respectively, a frequency converting circuit for frequency-converting an output of the receiving circuit with a local oscillation signal from a local oscillator; a demodulator for demodulating an output of the frequency converting circuit and outputting a demodulated signal; a detection circuit for detecting the synchronizing word from the demodulated signal, detecting whether a frame synchronizing condition is established, and detecting whether the first radio wave signal is being received; a frequency error detection circuit for detecting a frequency error in the output of the demodulation means; and a frequency control circuit responsive to the detection circuit for controlling a local oscillation frequency of the local oscillator according to th

Abstract: An antenna device includes a first antenna capable of moving between a storage position where the first antenna is contained within an equipment housing and an extended position where the first antenna is pulled out of the device housing for receiving and/or transmitting a signal. A second antenna is attached to the tip of the first antenna for receiving and/or transmitting a signal when the first antenna assumes the storage position. The rotator rotates the first antenna with respect to the device housing in the extended position.

Abstract: In a unit body of a portable information terminal is assembled a display and a pressure-sensitive input device overlying the display. An opening and closing cover is attached to the unit body for covering the pressure-sensitive input device. An operating button device provided in the cover exposes, when the cover is closed, its operating surface from the surface of the cover. The operating button device exerts a pressing force applied to the operating surface onto the surface of the pressure-sensitive input device. Thus, with the cover closed, major function entry or data entry can be carried out.

Abstract: A frequency conversion circuit for mixing first and second frequency signals to supply an output frequency signal comprises: first and second FETs having first and second gates for receiving the first and second frequency signals respectively; and a third FET having a third gate ac-grounded, the first to third FETs being connected in series such that a current flowing through the current circuit between the source and drain is controlled by the first to third gates, the third FET being provided between the first and second FETs. The third FET may also be provided between connection an end of the series connector and the second FET in accordance with frequency differences between the first and second frequency signals and between the second frequency signal and the output frequency signal. A triple gate FET can be used in place of these three FETs connected in series. A quad gate FET can be used also. A mixing circuit including the frequency conversion circuit mentioned above is also disclosed.

Abstract: An electrophotographic photoreceptor excellent in durability is disclosed, which has a conductive substrate having provided thereon a photosensitive layer, wherein said photosensitive layer contains a copolymerized polycarbonate resin comprising repeating units represented by structural formula (I) and repeating units represented by structural formula (II) as a binder resin: ##STR1## wherein m/(n+m) is from 0.1 to 0.9 by molar ratio.

Abstract: An electrophotographic photoreceptor for use in electrophotography having a photosensitive layer on an electrically conductive substrate. A fluorine-containing lubricating layer is further place upon the photosensitive layer. The fluorine-containing lubricating agent is selected from perfluoroalkyl polyether or its derivatives.

Abstract: An electrophotographic photoreceptor for use in positive charging electrophotographic machines is disclosed, comprising an electrically conductive substrate having thereon a charge transporting layer, a charge generating layer, and a low resistance surface protective layer, in that order, wherein a squarylium acid derivative having an asymmetrical structure represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 may be the same or different and represent a --CH.sub.3 group or a ##STR2## group (wherein Y represents a halogen atom), and X.sub.1 and X.sub.2 may be the same or different and represent a hydrogen atom, an --OH group or a halogen atom, is dispersed in said charge generating layer.