Abstract: A photoelectric encoder of the invention is furnished with a light-emitting element and a light-receiving element for sending and receiving light that are disposed in opposition to one another, and a support member for accommodating the light-emitting element and the light-receiving element. The support member is provided with a through hole between the light-emitting element and the light-receiving element. A code strip in which a plurality of slits have been formed is inserted through the through hole and moved so that it passes between the light-emitting element and the light-receiving element. As a result, light from the light-emitting element is intermittently incident on the light-receiving element through the plurality of slits in the code strip.

Abstract: A photoelectric encoder of the invention is furnished with a light-emitting element and a light-receiving element for sending and receiving light that are disposed in opposition to one another, and a support member for accommodating the light-emitting element and the light-receiving element. The support member is provided with a through hole between the light-emitting element and the light-receiving element. A code strip in which a plurality of slits have been formed is inserted through the through hole and moved so that it passes between the light-emitting element and the light-receiving element. As a result, light from the light-emitting element is intermittently incident on the light-receiving element through the plurality of slits in the code strip.

Abstract: In an optical receiver circuit chip, which constitutes an optical fiber link and converts a received optical signal into an electrical signal for communication, shutdown function is added to a bias circuit, which supplies power to an internal circuit such as a photodiode, amplifiers, a comparator and a buffer. Furthermore, a shutdown control circuit is provided in order to cause the bias circuit to perform a shutdown control in response to whether or not a plug for a transmission medium such as an optical fiber is inserted to a corresponding jack and in response to an shutdown signal inputted to a shutdown input terminal in accordance with user's operation. Therefore, the shutdown control can be realized with lower cost and smaller substrate space compared with a case where a regulator IC is separately used.

Abstract: A jack type connector 1, 21 includes: a retainer 2, 22 holding a converter 10, 30 and a first 11a, 11b, 11c, 31a, 31b, 31c and second 5, 6, 7, 8, 9, 25, 26, 27, 28, 29 terminals; and a plurality of ribs 4, 24 projecting from a peripheral portion of the retainer; wherein the retainer is fitted in a cutaway portion formed in a printed board 12 and having a configuration conformal to a profile of the retainer 2, 22 with the ribs 4, 24 abutting against the surface of the printed board 12 for engagement with the printed board.