Integrated injection logic amplifier and oscillator circuits

A circuit comprising an amplifier having a first transistor which has a first load transistor connected to a collector thereof, a second transistor which has a second load transistor connected to a collector thereof, means for transmitting a collector output of said first transistor to a base of said first transistor, means for transmitting a collector output of said first transistor to a base of said second transistor, an input terminal connected to a base of said first transistor, and a first output terminal connected to a collector of said second transistor, wherein said first transistor has a first collector connected to a third load transistor and a second collector connected to said first load transistor, and said collector output of said first transistor is directly transmitted to said base thereof from said first collector, and further comprising a capacitive element which is connected between said input terminal and said first output terminal, so that a collector output of said second transistor is fed back to a base of said first transistor so that said circuit operates as an oscillator, wherein current gains of said first transistor and said second transistor are made different thereby to make a collector current of said second transistor and a collector current of said second load transistor substantially equal thereby to shorten the oscillator start-up time.

A circuit comprising an amplifier having a first transistor which has a first load transistor connected to a collector thereof, a second transistor which has a second load transistor connected to a collector thereof, means for transmitting a collector output of said first transistor to a base of said first transistor, means for transmitting a collector output of said first transistor to a base of said second transistor, an input terminal connected to a base of said first transistor, and a first output terminal connected to a collector of said second transistor, wherein said first transistor has a first collector connected to a third load transistor and a second collector connected to said first load transistor, and said collector output of said first transistor is directly transmitted to said base thereof from said first collector, and further comprising a capacitive element which is connected between said input terminal and said first output terminal, so that a collector output of said second transistor is fed back to a base of said first transistor so that said circuit operates as an oscillator, wherein means is provided for controlling a collector current of said second load transistor, and said collector current of said second load transistor and a collector current of said second transistor are made substantially equal to shorten the oscillator start-up time.