Abstract: A wireless communication apparatus for transmitting signals between a plurality of controllers and a master unit in a wireless fashion and a game machine using the wireless communication apparatus are disclosed, wherein different delay times are set for the respective controllers, each of the controllers comprises a first receiver for receiving a reference time signal from the master unit, an input device for inputting an operating signal by a user and a first transmitter for transmitting the operating signal to the master unit at the delay time set for the controller after receiving the reference time signal and the master unit comprises a reference time signal generator for repeatedly generating the reference time signal, a second transmitter for transmitting the reference time signal to each controller, a second receiver for receiving the operating signal transmitted from each of the controllers and a discriminator for taking out output signals from the signals received by the second receiver, respectively

Abstract: A circuit for detecting a code violation in an alternate mark inversion signal comprises a first detecting circuit receiving the alternate mark inversion signal for generating a first detection signal at continuous occurrence of two first polarity signals without an intervening signal of a second polarity, the first and second polarity signals being indicative of the same binary logical level, and a second detecting circuit receiving the alternate mark inversion signal for generating a second detection signal at continuous occurrence of two second polarity signals without interleaving the first polarity signal. The first detection signal is inputted to a first enable signal generating circuit for generating a first enable signal having a predetermined active period, and the second detection signal is inputted to a second enable signal generating circuit for generating a second enable signal having a predetermined active period.