Circuit With Selected Transistors Made Non-Saturating to Maintain Circuit Margins
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-09
Some integrated circuit modules have a number of non-saturating transistor stages in an initially generalized array. Selected circuits are interconnected to provide a module having a specific function. The anti-saturation feature is established by connecting a Schottky diode between the base terminal and collector terminal of a transistor so that the base collector junction cannot become forward biased. The diode limits the voltage swing at the collector terminal to prevent saturation, thereby improving the switching speed. However, the limited voltage swing makes the transistor stage more likely to operate only marginally.