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Junction transistor
Point-contact transistor
Silicon transistor
Transistor-transistor logic
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Junction transistor
→
Point-contact transistor
evolved from
Junction transistors improved on the reliability and manufacturability of point-contact devices by using carrier transport within the bulk material.
Silicon transistor
→
Junction transistor
evolved from
Silicon materials and diffusion processes improved the high-temperature performance, leakage characteristics, and mass-manufacturing properties of junction transistors.
Transistor-transistor logic
→
Junction transistor
depends on
TTL uses bipolar junction transistors in its switching and drive stages, inheriting the speed and drive characteristics of junction devices.