公开(公告)号：US3891977A

公开(公告)日：1975-06-24

申请号：US48838774

申请日：1974-07-15

Applicant: FAIRCHILD CAMERA INSTR CO

Inventor： AMELIO GILBERT F ,  LIVEZEY JACK A ,  SALSBURY PHILLIP J

IPC: G11C27/04 ,  G11C19/28 ,  G11C11/40

CPC classification number: G11C19/287 ,  G11C19/285

Abstract: A charge coupled memory device is disclosed which comprises a plurality of CCD shift registers, input write circuitry, output read circuitry, and a plurality of charge comparison circuits, each of which are coupled between corresponding ones of the CCD shift registers. Each charge comparison circuit includes an active charge comparator device having a pair of field effect transistors that are cross-coupled to one another. Charge is applied from the output of the preceding shift register to an input of the charge comparison circuit, and the charge is compared with a reference charge developed from a reference signal. The charge comparison circuit provides complementary logic output signals that correspond to whether the input charge is greater or less than the reference charge. The charge comparison circuit is insensitive to voltage variations in the DC power supply and does not consume any DC power. The output logic signals are compatible with the logic levels of the external circuitry.

Abstract translation: 公开了一种电荷耦合存储器件，其包括多个CCD移位寄存器，输入写入电路，输出读取电路和多个电荷比较电路，每个电荷比较电路耦合在相应的CCD移位寄存器之间。 每个电荷比较电路包括具有彼此交叉耦合的一对场效应晶体管的有源电荷比较器装置。 从前一移位寄存器的输出向充电比较电路的输入端施加充电，并将该电荷与从参考信号产生的参考电荷进行比较。 电荷比较电路提供对应于输入电荷是大于还是小于参考电荷的互补逻辑输出信号。 电荷比较电路对直流电源的电压变化不敏感，不消耗任何直流电力。 输出逻辑信号与外部电路的逻辑电平兼容。