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Title:
COMPOSITE TRANSISTOR CIRCUIT
Document Type and Number:
Japanese Patent JPS5521677
Kind Code:
A
Abstract:

PURPOSE: To prevent unnecessary oscillation, by taking the base of the first and second transistor TR in common connection, connecting the respective emitter to the first terminal via a resistor, and connecting the collector of first TR to the emitter of the third TR.

CONSTITUTION: The terminal P1 is connected to the base of the lateral PNP transistor TRQ1, and the collector of TRQ1 is connected to each base of NPNTRQ2 and NPNTRQ3. Each emitter of TRQ2, Q3 is connected to the terminal P2 via the resistors R2 and R3 respectively. Further, the emitter of TRQ1 and the collector of TRQ2 are connected to the power supply terminal P3 via the resistor R1, and the collector of TRQ3 is connected to the power supply terminal P3. With the circuit constitution equivallently increasing the current amplification factor of the lateral PNPRT, the feedback loop gain can be reduced to prevent unnecessary oscillation.


Inventors:
GOMI HIROSHI
Application Number:
JP9521478A
Publication Date:
February 15, 1980
Filing Date:
August 04, 1978
Export Citation:
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Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
H01L21/331; H01L21/8228; H01L27/082; H01L29/73; H03F3/34; H03F3/343; (IPC1-7): H01L27/06; H01L29/72