Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A single package integrated circuit device for biasing a quasi-linear bipolar device, comprising: a differential transistor pair, having a first transistor and a second transistor wherein the emitters of the first and second transistor are connected; a Darlington transistor pair, having a third and a fourth transistor, with the base of the third transistor connected to the collector of the second transistor and the base of the fourth transistor connected to the emitter of the third transistor; a reference device for monitoring the base-emitter voltage of the biased device; a voltage control input, for electronically adjusting the base-emitter voltage level of the biased device, connected to the base of the first transistor; and means for changing the class of operation of the biased device.
Claim 2
Dependent Claim
28 words
The biasing device of claim 1, wherein changing the class of operation of the biased device is accomplished by changing the voltage level of the voltage control input.
Claim 3
Dependent Claim
29 words
The biasing device of claim 2, wherein the voltage control input is suitable for control by a computer such that frequent and small changes in voltages may be realized.
Claim 4
Dependent Claim
18 words
The biasing device of claim 2, wherein class of operation refers to classes A, AB1, AB2, and B.
Claim 5
Dependent Claim
19 words
The biasing device of claim 1, wherein the reference device is in close thermal proximity to the biased device.
Claim 6
Dependent Claim
13 words
The biasing device of claim 5, wherein the reference device is a diode.
Claim 7
Dependent Claim
25 words
The biasing device of claim 1, wherein the emitters of the first transistor and the second transistor are decoupled from ground through a small resistance.
Claim 8
Dependent Claim
36 words
The biasing device of claim 7, wherein the small resistance is a resistor which behaves as a constant current source and the current through the resistor is shared between the first transistor and the second transistor.
Claim 9
Dependent Claim
26 words
The biasing device of claim 1, wherein the collector of the third transistor and the collector of the fourth transistor are connected to the power supply.
Claim 10
Dependent Claim
23 words
The biasing device of claim 1, wherein a resistive element supplies current from a power supply to the base of the third transistor.
Claim 11
Dependent Claim
13 words
The biasing device of claim 10, wherein the resistive element is a resistor.
Claim 12
Dependent Claim
15 words
The biasing device of claim 1, wherein the biased device is a bipolar RF transistor.