Feedback cascode amplifier
AssigneePacific Monolithics
InventorsAllen F. Podell, Fazal Ali, Robert H. Benton
Life of this patent
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Abstract
A microwave-frequency feedback amplifier circuit has a cascode amplifier with a first field-effect transistor (FET) having a gate for receiving a signal to be amplified, a source coupled to a reference voltage, and a drain. A second FET has a source coupled to the drain of the first FET, a source coupled to the reference voltage, and a drain. A transformer includes a first inductor with a first terminal coupled to the drain of the second FET and a second terminal for outputting an amplified input signal. A second inductor has a first terminal coupled to the second terminal of the first inductor, and a second terminal coupled to the reference voltage. A feedback circuit couples the drain of the second FET to the gate of the first FET.
Claims9
A microwave-frequency feedback cascode amplifier comprising:
- cascode amplifier means comprising a first field-effect transistor means (FET) having a gate for receiving a signal to be amplified, a source coupled to a reference voltage, and a drain;
- and a second FET having a source coupled to the drain of the first FET, a gate coupled to the reference voltage, and a drain;
- first inductance means having a first terminal coupled to the drain of the second FET, a second terminal for outputting an amplified input signal;
- second inductance means having a first terminal coupled to the second terminal of the first inductance means, and a second terminal coupled to the reference voltage;
- and
- feedback means coupling the drain of the second FET to the gate of the first FET means.
Dependencies are inferred from the claim text.