Invited: Vertical Injection Logic –An Improved Structure of Integrated Injection Logic–
Takao Nakano, Yasutaka Horiba, Koichi Kijima, K. Tanaka, Osamu Tomisawa · Japanese Journal of Applied Physics · 1977
Vertical injection logic (VIL), an improved structure of integrated injection logic (I 2 L) with the vertical pnp injector, has shown the better electrical performances. The current gain α of the pnp transistor has been increased to 0.7∼1.0 in comparison with 0.4∼0.5 of usual one and this higher α in VIL has contributed to improve the power-delay product in the extrinsic region. The intrinsic delay time was also improved by the action of the bottom injector. The experimental results showed the minimum delay time of 6.5 ns and power-delay product of 0.07 pJ for VIL compared to 10.5 ns and 0.2 pJ for standard I 2 L. The capability of the very low power-delay product was examined with the wristwatch IC and the low propagation delay time was applied to the static RAM.