Abstract: An amplifier circuit includes a first transistor, a second transistor, a first pathway and a second pathway. The first transistor amplifies an external signal that is input from outside the amplifier circuit. The second transistor amplifies a detection signal that detects a level of the external signal. The first pathway is connected between a collector of the first transistor and a base of the second transistor to supply the detection signal that is output from the collector of the first transistor to the base of the second transistor. The second pathway is connected between an emitter of the first transistor and the base of the second transistor to supply a bias voltage from the emitter of the first transistor to the base of the second transistor.

Abstract: An amplifier circuit includes a first transistor, a second transistor, a first pathway and a second pathway. The first transistor amplifies an external signal that is input from outside the amplifier circuit. The second transistor amplifies a detection signal that detects a level of the external signal. The first pathway is connected between a collector of the first transistor and a base of the second transistor to supply the detection signal that is output from the collector of the first transistor to the base of the second transistor. The second pathway is connected between an emitter of the first transistor and the base of the second transistor to supply a bias voltage from the emitter of the first transistor to the base of the second transistor.

Abstract: There is provided a mobile terminal apparatus in which downsizing of the mobile terminal apparatus can be achieved and an antenna characteristic can be suitably supplied. In a mobile terminal apparatus 10, upper and lower housing 13 and 15 are coupled with each other by a coupling part 18 so as to be openable and closable, upper and lower circuit boards 21 and 24 are provided in the upper and lower housing 13 and 15, upper and lower protective cover parts 31 and 32 cover the upper and lower housing; and a flexible part 33 couples the upper and lower protective cover parts so as to be openable and closable and covers the coupling part. In the mobile terminal apparatus 10, an antenna power feeding land 51 is provided in one of the upper and lower circuit boards, a power feeding terminal of the antenna part 40 is electrically connected to this one circuit board via the antenna power feeding land, and the antenna part is housed in the flexible part.

Abstract: In a folding mobile radio device, a gain is lowered considerably in its close state under such a condition that an upper case is excited directly in its open state to aim at a wide band and a high gain is used as an antenna. A folding mobile radio device includes a first case, a second case, a jointing portion for connecting the first case and the second case to open/close, a conductor element arranged in the first case, and a feeding element arranged in the second case. Then, in an open state via the jointing portion, the conductor element and the feeding element come close to each other and are coupled magnetically at a time of feeding a power whereas, in a close state via the jointing portion, the conductor element and the feeding element are apart from each other rather than the open state and are not coupled magnetically at a time of feeding a power.

Abstract: Herein disclosed is a portable wireless device, comprising: a first case 11 having a metal portion; a second case 12; a hinge portion 13 operative to rotatably connect the first case with the second case; a circuit board 18 having a ground pattern, the circuit board accommodated in the second case; and a feed portion connected to the circuit board, the hinge portion 13 having a rotating shaft 23 formed by a conductive metal, and the first case, the rotating shaft 23 and the ground pattern collectively function as an antenna element, wherein the portable wireless device further comprises a first conductor element 25 accommodated in the first case 11 in spaced-apart relationship with the rotating shaft 23 with a predetermined gap, the first conductor element having an electrical length substantially equal to a half wavelength of a wireless frequency.

Abstract: The invention is to improve antenna performance in an internal antenna in a closed state without deteriorating the antenna performance in a state where a foldable portable radio apparatus is opened. A foldable portable radio apparatus includes a foldable mechanism in which an upper casing 101 and a lower casing 104 are rotatably connected, a first conductor plate 102 and a second conductor plate 103 that are provided in the upper casing 101, and a feeding system that is provided in the lower casing 104, and connects an antenna element 107, a circuit board 105, the first conductor plate 102, and the circuit board, a detecting unit 109 that detects opened and closed states between the upper casing 101 and the lower casing 104, and a first switching unit 110 that switches between an electrically opened state and an electrically short-circuited state between the first conductor plate and the second conductor plate according to the detected result by the detecting unit 109.

Abstract: There is provided a mobile terminal apparatus in which downsizing of the mobile terminal apparatus can be achieved and an antenna characteristic can be suitably supplied. In a mobile terminal apparatus 10, upper and lower housing 13 and 15 are coupled with each other by a coupling part 18 so as to be openable and closable, upper and lower circuit boards 21 and 24 are provided in the upper and lower housing 13 and 15, upper and lower protective cover parts 31 and 32 cover the upper and lower housing; and a flexible part 33 couples the upper and lower protective cover parts so as to be openable and closable and covers the coupling part. In the mobile terminal apparatus 10, an antenna power feeding land 51 is provided in one of the upper and lower circuit boards, a power feeding terminal of the antenna part 40 is electrically connected to this one circuit board via the antenna power feeding land, and the antenna part is housed in the flexible part.

Abstract: Herein disclosed is a portable wireless device, comprising: a first case 11 having a metal portion; a second case 12; a hinge portion 13 operative to rotatably connect the first case with the second case; a circuit board 18 having a ground pattern, the circuit board accommodated in the second case; and a feed portion connected to the circuit board, the hinge portion 13 having a rotating shaft 23 formed by a conductive metal, and the first case, the rotating shaft 23 and the ground pattern collectively function as an antenna element, wherein the portable wireless device further comprises a first conductor element 25 accommodated in the first case 11 in spaced-apart relationship with the rotating shaft 23 with a predetermined gap, the first conductor element having an electrical length substantially equal to a half wavelength of a wireless frequency.

Abstract: In a folding type portable wireless unit, gain deteriorates sharply upon closure, in the case where an upper case is oscillated directly at the time of opening and used as an antenna in order to attain a wide band and a high gain. The folding type portable wireless unit comprises a first case, a second case, a coupling part for coupling the first and second cases to be opened/closed, a conductor element arranged in the first case, and a power supply element arranged in the second case. In the open state brought by the coupling part, the conductor element and the power supply element approach closely to each other and can be coupled electromagnetically at the time of power supply. In the closed state brought by the coupling part, the conductor element and the power supply element separate from each other as compared with the open state and they are not coupled electromagnetically at the time of power supply.

Abstract: The invention is to improve antenna performance in an internal antenna in a closed state without deteriorating the antenna performance in a state where a foldable portable radio apparatus is opened. A foldable portable radio apparatus includes a foldable mechanism in which an upper casing 101 and a lower casing 104 are rotatably connected, a first conductor plate 102 and a second conductor plate 103 that are provided in the upper casing 101, and a feeding system that is provided in the lower casing 104, and connects an antenna element 107, a circuit board 105, the first conductor plate 102, and the circuit board, a detecting unit 109 that detects opened and closed states between the upper casing 101 and the lower casing 104, and a first switching unit 110 that switches between an electrically opened state and an electrically short-circuited state between the first conductor plate and the second conductor plate according to the detected result by the detecting unit 109.

Abstract: To provide a folding-type portable wireless equipment which can obtain good antenna performance in a folding-type portable wireless equipment having the structure for opening and closing cases by using a bendable plane-shaped coupling member.

Abstract: In a folding-type portable wireless equipment having the structure that a bendable plane-shaped coupling member is used for a opening and closing mechanism of cases, to realize the antenna configuration which can improve antenna performance and maintain high communication quality.

Abstract: In a cellular phone terminal foldable by a hinge and including upper and lower split pieces, monopole antennas are formed on a flexible printed wiring board and a printed wiring board and a lower housing is formed with a finger grip portion such that not only deterioration of characteristics is prevented but the lower housing can be held easily.

Abstract: In a cellular phone terminal foldable by a hinge and including upper and lower split pieces, monopole antennas are formed on a flexible printed wiring board and a printed wiring board and a lower housing is formed with a finger grip portion such that not only deterioration of characteristics is prevented but the lower housing can be held easily.

Abstract: In a portable telephone, a main body case and a cover case are connected rotatably by a hinge portion. Further, the main body case is made of a resin material, metal, or a material including metal, and the cover case is made of a metal material. Further, when the portable telephone is used, the cover case is positioned on a side surface of an antenna. Therefore, the current becomes easy to flow, and the current flowing in the main body decreases. Accordingly, the disturbance of the current distribution in case that the main body case is held by the user's hand decreases, so that it is possible to reduce the deterioration of antenna gain.

Abstract: A variable-exposure-size camera has an aperture member which defines an aperture through which a photographic film positioned behind the aperture member is exposed to light passing through a taking lens, and a pair of mask members which are disposed between the aperture member and the taking lens and are moved up and down toward and away from each other to change the effective upper and lower edges of the aperture, thereby narrowing the effective opening area of the aperture. The lower edge portion of the upper mask member and the upper edge portion of the lower mask member are bent toward the film surface so that the extreme edges of the edge portions which respectively define the upper and lower edges of the effective opening area of the aperture are positioned near the film surface.

Abstract: A drive mechanism for a zoom lens system consisting of first and second lens groups has a movable lens barrel fixedly holding the first lens and cam structure consisting of a cam member provided on the second lens group and a cam follower member on the movable lens barrel. The movable lens barrel moves forward or rearward to shift the second lens group forward or rearward relative to the first lens group along the optical axis of the zoom lens system via the cam member so as to continuously change the focal length of the zoom lens system. The cam member is mounted on the movable lens barrel to change the curve of the cam surface relative to the cam follower member only in a middle focal length range.

Abstract: A camera with a zoom lens system having at least front and rear lens groups each comprising at least one lens, comprises a movable lens barrel holding the front lens group and being axially movable rearwardly and forwardly relative to a camera body and a moving mechanism for causing the axial movement of the movable lens barrel.

Abstract: A camera is disclosed which is capable of winding and rewinding a film and adjusting a focal distance by use of a single motor. In the camera, the forward rotation of the motor is used to wind the film, and when the film winding operation is completed after termination of photographing, on detecting the end of the film, a torque detect mechanism switches a planetary clutch mechanism to connect the motor with a film rewinding mechanism. Thus, it is possible to perform both the film winding and rewinding operations by use of the rotation of the motor in the same direction. Also, when, with the planetary clutch mechanism connected with the film winding mechanism, the motor is rotated reversely, then the power transmission system is switched over to a focal distance varying mechanism, whereby the focal distance can be adjusted.

Abstract: A camera having a viewfinder and a taking lens changeable in focal length between at least two different focal lengths: a relatively short focal length suitable for wide-angle photography and a relatively long focal length suitable for telephotography and that allows close-up photography when the taking lens is changed to have the long focal length. The viewfinder has at least one movable lens which is axially moved and shifted away from the optical axis of the finder with respect to the axis of the taking lens when the taking lens is changed in focal length, to deflect the optical axis of the finder in order to cancel parallax error, depending on object distance.