ZERO CURRENT DRAIN CURRENT REFERENCE STARTUP
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-05
The current reference circuits commonly used in paging have two stable operating states. One state is the desired state where the operating current is set by a delta Vbe and a resistor (Rl). The other state is undesired, and is the zero current state. In all previous designs, a large resistor (typically 700K) was used to insure the circuit is biased to the desired state. This resistor takes a lot of area on the integrated circuit chip and consumes power.