The TTL output stage is a rather complicated pushâpull circuit known as a totem-pole output (the transistors, diode, and resistor in the right-most slice of this TTL logic gate circuit). It sinks currents better than it sources current.
The theory for spontaneous generation refers to the idea that life can produced from nonliving things. Lazzaro Spallanzani proposed in his experiement that air was necessary for spontaneous generation.
Filippo Brunelleschi. Italian Renaissance architect. In the early years of the fifteenth century Filippo Brunelleschi was the young architect at the forefront of Italian Renaissance architecture. He was the leader of a group of young Italian Renaissance artists who became intent on creating a new art and to break with the ideas of the past.