Analog-to-digital converter made with focused ion beam technolog

Details Analog-to-digital converter made with focused ion beam technolog Analog-to-digital converter made with focused ion beam technolog

1988-02-08

1989-10-03

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

With particular solid state devices

341136, 357 237, H03M 118

Patent

active

048720100

ABSTRACT:
An analog-to-digital converter 10 employs a series of comparators 12, 14, 16 and 18. Each comparator includes at least one inverter consisting of a CMOS transistor pair including a P-channel transistor 22 and N-channel transistor 24. The threshold levels of the transistors 22, 24 are modified using focused ion beam implantation techniques to provide the comparators with monotonically increasing transistion levels.

REFERENCES:
patent: 4212684 (1980-07-01), Brower
patent: 4420743 (1983-12-01), Upadhyayula
Solid State Devices, Proceedings of the 6th Conf. on Solid State Devices, Tokyo, 1974, Supplement to the Journal of the Japan Society of Applied Physics, vol. 44, 1975, T. Yamaguchi et al.: "Investigations of Continuously Variable Threshold Voltage Devices (CVTD)", pp. 233-242, see abstr.; p. 235, col. 2, line 34-p. 236, col. 1, line 2; p. 239, col. 2, line 26-p. 240, col. 2, line 11; FIG. 8a.
IEEE Trans. on Elect. Devices, vol. ED-22, No. 5, May 1975, T. Yamaguchi, pp. 295-297.
Electronic Design, vol. 36, No. 16, Jul. 14, 1988 (Hasbrouck Heights, N.J., US), p. 34.

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