Electrical pulse counters – pulse dividers – or shift registers: c – Charge transfer device – Particular input or output means
Patent
1994-11-02
1995-07-25
Wambach, Margaret Rose
Electrical pulse counters, pulse dividers, or shift registers: c
Charge transfer device
Particular input or output means
257239, 257402, 257403, G11C 1928, H03K 2346
Patent
active
054369495
ABSTRACT:
The present invention is directed to a charge transfer apparatus. A reset gate (RG) is formed of an N-channel MOSFET of depletion type in which a carrier concentration of a channel region is set in a range from 10.sup.15 to 5.times.10.sup.16 cm.sup.-3. Also, a circuit for generating a reset pulse that is supplied to the reset gate (RG) is constructed as follows. A drain voltage source (12) and a drain of a transistor (Tr) are connected via a junction (a), and two resistors (R1) and (R2) are connected in series between the anode of the drain voltage source (12) and the ground. A junction (b) between the resistors (R1) and (R2) and the reset gate (RG) are connected together via an input line (13) and a high resistance (Rh) is inserted into the input line (13). Further, a coupling capacitor (Cc) is connected between a clock pulse input terminal (.phi.in) and the input line (13). Thus, an amount that a potential formed under the reset gate is fluctuated by a fluctuation of an amount of implanted impurities and a fluctuation of a drain voltage can be reduced and hence a stable reset operation can be carried out.
REFERENCES:
patent: 5247554 (1993-09-01), Yamado
Hasegawa Kenji
Suzuki Junya
Sony Corporation
Wambach Margaret Rose
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