Abstract: A camera is adapted for self photography by provision of a reflective element disposed over a image receiving means thereof. The reflective element is disposed along or proximate to the focal axis of the image receiving portion for avoiding a parallax effect such that a camera operator may accurately monitor the image during self photography. Several variations on the arrangement of the reflective element allow various photographic effects to be obtained and in addition, the arrangement of the invention may also by applied for effecting audio/visual communication.

Abstract: A signal translating circuit comprises first and second transistors connected to each other in such a manner that a collector of the first transistor is coupled with a base of the second transistor and an emitter of the second transistor is coupled with a base of the first transistor so as to form a negative feedback circuit arrangement, an input resistor connected between the base of the first transistor and a source of an input voltage signal for converting the input voltage signal into an input current signal to be supplied to the base of the first transistor, a biasing current source connected to the base of the first transistor, first and second current sources supplying the same currents and connected to the emitter of the first transistor and a collector of the second transistor, respectively, and means for deriving an output current signal from the collector of the second transistor.

Abstract: A control circuit used in a color television receiver for controlling a reproduced picture in response to an ambient light level has a photo-sensitive device, a transistor whose base electrode is connected to the photo-sensitive device, a variable resistor connected in series to the transistor, a voltage controlled contrast control circuit and a voltage controlled color saturation control circuit both controlled by a control voltage obtained at a movable contact of said variable resistor, and a switch connected in parallel to the transistor which is adapted to be manually closed.