Amplifiers – Involving structure other than that of transformers per se – With printed circuits
Patent
1979-12-13
1982-03-16
Mullins, James B.
Amplifiers
Involving structure other than that of transformers per se
With printed circuits
307310, 330289, H03F 304
Patent
active
043203493
ABSTRACT:
An easily installed thermal coupler inserted in the extruded section of a heat sink on which a transistor amplifier is mounted and positioned on a circuit board in thermal contact with diode biasing means coupled to the transistor amplifier. By thus thermally coupling the biasing means with the amplifier in a self-correcting, negative feedback loop, stable transistor operation is achieved and thermal runaway prevented. Employing a unitized metallic heat conducting member having a base plate including connecting studs for circuit board mounting and an upright member extending therefrom, the heat coupler may be used as either a heat sink or heat transfer device in carrying heat either out of or into the circuit board.
REFERENCES:
patent: 2951208 (1960-08-01), Barton
patent: 3128431 (1964-04-01), Walker
patent: 4151547 (1979-04-01), Rhoades et al.
patent: 4207481 (1980-06-01), Dobkin
patent: 4242598 (1980-12-01), Johnson et al.
Wakefield Semi-Conductor Heat Sinks and Thermal Products, Distributor Products Catalog No. 102 (1970 Edition), p. 17.
Freers Alan W.
Pittenger Daniel I.
Kail Jack
Mullins James B.
Zenith Radio Corporation
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