INFORMATION OUTPUT DEVICE OF INTERCHANGEABLE LENS,申请号JP19850292476-传众专利搜索

INFORMATION OUTPUT DEVICE OF INTERCHANGEABLE LENS

申请公布号：JPS62153841(A)

申请号：JP19850292476

申请日期：1985.12.27

申请公布日期：1987.07.08

申请人：

SIGMA:KK

发明人：HAMANO HIDEO

分类号：G03B7/091;G03B7/20;G03B17/14;H04N5/232

主分类号：G03B7/091

摘要：PURPOSE:To reduce the number of signal lines required for transmission of information and to simplify the circuit constitution by providing a circuit which discriminates only a clock pulse number outputted as a high-level signal out of information intrinsic to an interchangeable lens by comparison. CONSTITUTION:AND gates AN1-AN6 connected to 4-bit outputs C0-C3 of a counter CO are set by the clock pulse number which is outputted as a high- level signal out of intrinsic information transmitted from the interchangeable lens to a camera body. The counted value of the counter and the clock pulse number outputted as the high-level signal out of intrinsic information transmitted from the interchangeable lens to the camera body are compared with each other, and a high-level signal is outputted through an OR gate OR if they coincide with each other. If they do not coincide with each other, a low-level signal is outputted, and information intrinsic to the interchangeable lens is transmitted to the camera body synchronously with clock pulses in serial bit by bit.