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US 4,647,872 AGranted
Cascode amplifier
OwnerWilliam Z. Johnsoninventor
Life of this patent
Estimating the term…
Abstract
A stabilized Cascode Amplifier Circuit wherein the grid or gate control of the second stage of the cascaded input is provided by feedback of a portion of the output signal voltage. The circuit can be further enhanced by the inclusion of a unity gain follower between the first and third stage of the cascode amplifier circuit.
Claims7
An electron tube cascode-cascade amplifier comprising:
- a cascode input stage including a cascode pair comprising first and second electron tubes, said first tube acting as the signal input tube;
- said input stage including unity gain buffer means fpor connecting the plate of said first tube to the cathode of said second tube through a buffered, unity gain circuit path;
- a cascaded output stage including an output electron tube connected to be driven by the plate output of said second tube;
- and
- means for connecting said input and output stages to an operating bias.
2 more elements
A transistorized cascode-cascade amplifier comprising:
- a cascode input stage including a cascode pair comprising first and second transistors, said first transistor acting as the signal input transistor;
- said input stage including unity gain buffer means for connecting the output of said first transistor to the input of said second transistor through a buffered, unity gain circuit path;
- a cascoded output stage including an output transistor connected to be driven by the output of said second transistor;
- and
- means for connecting said input and output stages to an operating bias.
2 more elements
A cascode-cascade amplifier comprising:
- a cascode input stage including a cascode pair comprising first and second amplifying devices, said first device acting as the signal input device;
- said input stage including unity gain buffer means for connecting said cascode pair together throgh a buffered, unity gain circuit path;
- a cascaded output stage including an output amplifying device connected to be driven by the output of said second device;
- and
- means for connecting said input and output stages to an operating bias.
2 more elements
A cascode input stage for an amplifier comprising:
- a cascode input stage including a cascode pair comprising first and second amplifying devices, said first device acting as the signal input device;
- said input stage including unity gain buffer means for connecting said cascode pair together through a buffered, unity gain circuit path;
- and
- means for connecting said input stage to an operating bias.
1 more element
Dependencies are inferred from the claim text.