Abstract: A waveform shaping circuit includes an input terminal, an output terminal, and a plurality of cascaded circuit stages. Each of the cascaded circuit stages includes a delay circuit having an output and an input, a current source, and a switch circuit, connected electrically to the output of the delay circuit and controlled by the delay circuit, for connecting electrically the current source to the output terminal. The input of the delay circuit of a first one of the circuit stages is connected electrically to the input terminal. The input of the delay circuit of remaining ones of the circuit stages is connected electrically to the output of the delay circuit of an immediately preceding one of the circuit stages. The delay circuits have equal delay times. The total delay time provided by the delay circuits of the circuit stages is equal to or is a multiple of half a bit time of the fundamental data rate.

Abstract: A driver circuit is to be used with an attachment unit interface in a network system and receives complementary data signals and an enable signal from constant current source and a differential transistor pair which includes a pair of differential transistors and a pair of load resistors. Each of the differential transistors has a gate terminal which receives one of the complementary data signals, a drain terminal which is connected to one of the load resistors, and a source terminal which is connected to the constant current source. A switch network is connected to the drain terminal of the differential transistors and is activated by the enable signal so as to generate a differential voltage output. Each of a pair of source followers has a gate terminal connected to the switch network and a source terminal The source followers receive the differential voltage output from the switch network.

Abstract: A pistol lighter includes a hollow pistol casing having a barrel portion and a perforated butt portion, a gas cylinder disposed inside the barrel portion, a movable trigger to release gas from the gas cylinder, a spark generator having a biased push button abutting the trigger and an electrode to ignite the released gas from the gas cylinder, a plurality of light emitting diodes disposed at the barrel portion, a speaker fixed inside the hollow pistol casing adjacent to the butt portion, a control circuit similarly disposed inside the hollow casing to actuate the light emitting diodes and the speaker, and a contact switch to activate the control circuit. The trigger has a contact member to actuate the contact switch whenever the trigger is pulled.