Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1983-11-02
1986-03-25
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307263, 307246, 307268, 307270, H03K 3017, H03K 504
Patent
active
045785970
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a pulse generating circuit which can produce a pulse having relatively large amplitude and appearing in a predetermined phase and is suitable to be used for forming a driving circuit arrangement for a solid state image pickup device or a liquid crystal displaying device.
TECHNICAL BACKGROUND
A solid state image pickup device in which a plurality of photoelectric converters arranged in horizontal and vertical rows and a charge transfer device are contained and charge obtained in the photoelectric converters is transferred by the charge transfer device so as to produce an image pickup signal output, a liquid crystal displaying device in which a voltage is supplied to selected portions of a liquid crystal part formed into a flat panel so as to display a desired pattern thereon and so on, are usually driven by a series of pulse voltages appearing successively with a predetermined phase diference between each successive two of them. In such cases, it is required for each of the pulse voltages to have relatively large amplitude, such as being 10-40 volts, and a driving circuit arrangement provided for driving or scanning such a solid state image pickup device or liquid crystal displaying device is required to produce driving pulses each having relatively large amplitude accurately with reduced power consumption.
The driving circuit arrangement for the solid state image pickup device or the liquid crystal displaying device has been usually composed of a shift register and previously proposed such driving circuit arrangements are unsatisfactory to comply with the above mentioned requirement.
DISCLOSURE OF THE INVENTION
Accordingly, it is an object of the present invention to provide a novel pulse generating circuit capable of being used for constituting a driving circuit arrangement which produces a series of pulses each having relatively large amplitude accurately with reduced power consumption.
A pulse generating circuit according to the present invention which comprises first and second switching elements connected in series to each other, a series connection of a third switching element and a capacitive element coupled with a connected point between the first and second switching elements, an amplifying element supplied with the voltage from a power source and having input and output terminals connected to both ends of the capacitive element, respectively, and a fourth switching element connected to the output end of the amplifying element, is supplied with a first input signal varying in level through the control terminals of the first and third switching elements and a second input signal varying in level through the control terminals of the second and fourth switching elements, thereby to obtain a pulse having the width corresponding to the time interval from a variation in the level of the first input signal to a variation in the level of the seocnd input signal at the output terminal of the amplifying element.
With the pulse generating circuit according to the present invention thus constituted, such a pulse as to have relatively large amplitude obtained by making the most of the voltage from the power source and the width determined by the variations in the levels of the first and second input signals can be obtained surely in a phase defined by the variations in the levels of the first and second input signals and the electric power consumed during the pulse generating operation thereof can be considerably reduced. Further, in case that a plurality of the pulse generating circuits according to the present invention are used in the manner of series connection, pulses forming a plurality of groups with different phases can be obtained successively with a small overlapping portion between each successive two of them. Accordingly, the pulse generating circuit according to the present invention can be employed to constitute such a driving circuit arrangement as aforementioned and, in such case, the driving pulses each having the relatively large amplitude can
REFERENCES:
patent: 3842411 (1974-10-01), Naito
patent: 3852625 (1974-12-01), Kubo
patent: 3932773 (1976-01-01), Luscher et al.
patent: 3937982 (1976-02-01), Nakajima
patent: 4245168 (1981-01-01), Waldron
patent: 4256976 (1981-03-01), Maggi
patent: 4412139 (1983-10-01), Horninger
Fukuzawa Manami
Ohtsu Takaji
Soneda Mitsuo
Callahan Timothy P.
Miller Stanley D.
Sony Corporation
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