Faulty operation prevention circuit especially for setting apparatus in cordless telephone

摘要: The circuit prevents a faulty operation by disconnecting the current supply when an unstable is fed to setting apparatus of cordless telephone in order provide operating voltage using rectifier without battery. includes divider divide output from unit adapted level so as divided voltage. also has control unit. This controls depending on that divider. may include first transistor into which input, switch it and off. It have second according switching off transistor. base connected collector first.