Claims
- 1. An analog-to-digital converter comprising substrate means forming a single monolithic integrated-circuit chip including:
- a pluarlity of normal mode transistor current sources formed in said substrate means and individually controllable to produce respective binarily-weighted currents for summation into a composite signal;
- I.sup.2 L inverted mode transistor means formed in said substrate means including circuit means defining successive-approximation control means capable of carrying out a successive-approximation algorithm; and
- transistor switch means on said substrate means responsive to said successive-approximation control means and serving to control said current sources to carry out said algorithm for developing a digital output corresponding to an unknown analog signal.
Parent Case Info
This application is a division of application Ser. No. 361,740 filed Mar. 25, 1982, now U.S. Pat. No. 4,556,870 which in turn is a division of Ser. No. 931,960 filed Aug. 8, 1978, now U.S. Pat. No. 4,400,689, which in turn is a continuation-in-part of Ser. No. 785,322 filed Apr. 7, 1977, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4013901 |
Williams |
Mar 1977 |
|
4176344 |
Saari et al. |
Nov 1979 |
|
Non-Patent Literature Citations (1)
Entry |
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 240-247. |
Divisions (2)
|
Number |
Date |
Country |
Parent |
361740 |
Mar 1982 |
|
Parent |
931960 |
Aug 1978 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
785322 |
Apr 1977 |
|