Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1981-08-18
1983-11-22
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307264, H03K 500
Patent
active
044171595
ABSTRACT:
A driver circuit for a capacitively loaded line employs the charge storage capacitance of a diode for raising the base of a driver transistor above the circuit power supply voltage level so as to pull up the line to within a transistor base-emitter voltage drop of the power supply voltage level. The driver is easily fabricated in integrated circuit form, as no capacitors, either on or off chip, are required.
The driver circuit includes a driver transistor, the collector of which is connected to the power supply and the emitter of which is connected to the line. A switching transistor has an input voltage applied between its base and emitter. A diode is connected between the switching and driver transistors, the anode being connected to the base of the driver transistor, and the cathode being connected to the collector of the switching transistor.
In response to a first input signal, the switching transistor turns on, forward biasing the diode and building up a voltage thereon as a result of the diode's charge storage capacitance. In response to a second input signal, the switching transistor turns off, raising the anode to the power supply voltage, and raising the cathode (and the base of the driver transistor connected thereto) to a voltage higher than the power supply voltage. The emitter of the driver transistor (and the line connected thereto) is thus pulled up to a value nominally approaching the power supply voltage, despite the base-emitter voltage drop of the driver transistor.
REFERENCES:
patent: 3171984 (1965-03-01), Eshelman et al.
patent: 3495100 (1970-02-01), Cubert et al.
patent: 3636383 (1972-01-01), Clubbe
patent: 3656004 (1972-04-01), Kemerer et al.
patent: 3657574 (1972-04-01), Christensen et al.
patent: 3684900 (1972-08-01), Greuter et al.
patent: 4019152 (1977-04-01), Harwood et al.
patent: 4061933 (1977-12-01), Schroeder et al.
patent: 4081699 (1978-03-01), Hirt et al.
patent: 4091296 (1978-05-01), Suzuki et al.
patent: 4176289 (1979-11-01), Leach et al.
Dorler Jack A.
Mosley Joseph M.
Seeger Richard O.
Weitzel Stephen D.
Bigel Mitchell S.
Callahan Timothy P.
Heyman John S.
International Business Machines - Corporation
LandOfFree
Diode-transistor active pull up driver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diode-transistor active pull up driver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diode-transistor active pull up driver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1816891