Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-03-13
1991-06-11
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307455, 307456, 307475, 307255, 307443, 307544, 307558, 307547, H03K 19092, H03K 19013, H03K 19017, H03K 19086
Patent
active
050234781
ABSTRACT:
The present invention relates to fast complementary emitter follower drivers/buffers to be used in either a CMOS or pure complementary bipolar environment. The output driver (22) comprises top NPN and bottom PNP output transistors (T1, T2) with a common output node (N) connected therebetween. A terminal (15) is connected to the said output node (N) where the output signal (VOUT) is available. The pair of bipolar output transistors is biased between the first and second supply voltages (VH, GND). The output driver is provided with a voltage translator circuit (S) connected between the base nodes (B1, B2) of the output transistors (T1, T2). Logic signals (IN1, IN2), supplied by a preceding driving circuit (21), are applied to said base nodes. According to the invention, the voltage translator circuit (S) comprises two diodes (D1, D2) connected in series, preferably implemented with a main bipolar transistor having a junction shorted by a diode connected transistor to form a Darlington-like configuration. As a result, the voltage shift VS between the base nodes is selected to have the said output transistors operating at an operating point which ensures minimum delay and power consumption. In a typical bipolar technology, VS is made to be approximately equal to 1.5V. Additional features comprise the connection of a capacitor (C) between the base nodes and resistances (R1, R2) to the base nodes. The preceding driving circuit may be a CMOS logic gate or an ECL logic circuit.
REFERENCES:
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IBM Technical Disclosure Bulletin, vol. 29, No. 4, Sep. 1986, pp. 1857-1858, entitled "Complementary FET Bipolar Circuit".
Boudon Gerard
Mollier Pierre
Ogura Seiki
Omet Dominique
Tannhof Pascal
Bertelson David R.
International Business Machines - Corporation
Miller Stanley D.
Ross Otho B.
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