Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1987-02-25
1989-07-04
Hix, L. T.
Facsimile and static presentation processing
Facsimile
Recording apparatus
250578, H04N 314
Patent
active
048455679
ABSTRACT:
An self-scan type linear image sensor comprises an array of a plurality of phototransistors or photodiodes, a shift register, and current switches operating in response to parallel output signals from the shift register. The shift register is comprised of thyristors and interstage coupling transistors cascade-connecting the thyristors. The current switches are comprised of a first differential current switch executing differential switching operations between parallel output signals from odd-number stages of the shift register and a first separation signal, and a second differential current switch executing differential switching operations between parallel output signals from even-number stages of the shift register and a second separation signal. Current outputs from these current switches are delivered to collectors of the phototransistors, which are connected at emitters, common to an image signal output line.
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patent: 4145721 (1979-03-01), Beaudouin et al.
patent: 4240116 (1980-12-01), Tomlinson, Jr.
patent: 4567529 (1986-01-01), Yamaguchi et al.
patent: 4686554 (1987-08-01), Ohmi et al.
D. Kasperkovitz "A 20-MHz P-N-N Shift Register with Current Mirror Coupling" IEEE Journal of Solid-State Circuits, vol. SC-10, No. 3, Jun. 1975.
Murata Takahiko
Yamaguchi Kazufumi
Yamamoto Yasunori
Gray David M.
Hix L. T,.
Matsushita Electric - Industrial Co., Ltd.
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