Constant current circuit feeding integrated unit - uses varying voltage source with min. dissipation and coupling between parallel current divider paths

摘要

The constant current supply source is suitable for feeding one or more tandem stages of I2L circuits from a source of very variable voltage with a minimum power dissipation. The unit has a first current distribution path of a diode D1 in a circuit B1 bridging the base-emitter junction of an NPN transistor T2. The emitter of T2 is connected to the negative line L2 and its collector/emitter junction is included in a second current circuit B2, connected to the positive line L1 via the collector/emitter junction of a pnp transistor with a resistance in its emitter circuit.