Unconditionally stabilized microwave transistor amplifier

Details Unconditionally stabilized microwave transistor amplifier Unconditionally stabilized microwave transistor amplifier

1979-10-02

1981-12-01

Smith, Alfred E.

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

330 53, H03F 360

Patent

active

043038921

ABSTRACT:
Input and output electrodes of a microwave, active semiconductor amplifying element are shunted to ground by resistive means having values selected to assure unconditional stability of the semiconductor amplifying element. The resistive means and active element are located in a common semiconductor package having three output terminals respectively connected to input, output and common electrodes of the amplifying element. The resistive means includes, in certain embodiments, first and second resistors respectively shunting the input and common electrodes and output and common electrodes, with values respectively selected to provide relatively high efficiency and low noise characteristics for the amplifying element.

REFERENCES:
patent: 3857106 (1974-12-01), Seidel
patent: 3936864 (1976-02-01), Benjamin
Hejhill, R., "RF Small Signal Design Using Two-Port Parameters", Motorola Application, Note 215A, 1967.
Rollett, J. M., "Stability and Power-Gain Invariants of Linear Two Ports", IRE Trans. Ckt. Theory, vol. CT-9, Mar. 1962, pp. 29-32.
"S-Parameters . . . Circuit Analysis and Design", Hewlett Packard Application, Note 95, Sep. 1968.
Linvill et al., "The Design of Tetrode Transistor Amplifiers", BSTJ, vol. 35, Jul. 19 56, pp. 813-840.
"Using Linvill Techniques for RF Amplifiers", Motorola Application Note Number 166, 1967.
Stern, A. P., "Stability and Power Gain of Tuned Transistor Amplifiers", Proc. I.R.E., vol. 45, Mar. 1957, pp. 335-343.
Ghausi, M. S., Principles and Design of Linear Active Circuits, McGraw-Hill, pp. 467-473.

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