Electrical pulse counters – pulse dividers – or shift registers: c – Charge transfer device
Patent
1988-06-30
1990-08-21
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Charge transfer device
377 60, 377 67, 307607, 365183, 365219, H03K 2346, H03K 5159, G11C 1134
Patent
active
049513028
ABSTRACT:
A two phase shift register comprises four serial registers each having an input section, a transfer section, and a lead-in section disposed between the input section and the transfer section. The input sections provide respective sequences of charge samples, the four sequences being offset in phase relative to each other by 90.degree. within the cycle of a clock signal. At least one of the serial registers comprises a first lead-in gate pair and a second lead-in gate pair over the lead-in section, the second lead-in gate pair being between the first lead-in gate pair and the transfer section. The first lead-in gate pair and the second lead-in gate pair are each driven at the frequency of the clock signal, the drive signal applied to the second lead-in gate pair being retarded in phase relative to that applied to the first lead-in gate pair by 90.degree. within the cycle of the clock signal.
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Hayes Raymond
Peter Joseph R.
Duong Tai V.
Heyman John S.
Meza Peter J.
Smith-Hill John
Tektronix Inc.
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