Application Note

1

2000-07-27

Application Note No. 014

Application Considerations

for the Integrated Bias Control Circuits

BCR400R and BCR400W

Silicon Discrete Components

Figure 1

RF Transistor Controlled by BCR400

Operating Point

• BCR400 stabilizes the operating current (i.e.

I

depends on the supply voltage:

V

• The voltage drop of approximately 0.65 V on

R

BCR400) is almost constant (

R

• In case a lower

V

V

between pin 4 and collector (or drain) or in series to the supply voltage

V

providing an additional voltage drop.