Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-06-20
1987-12-29
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 307496, 307350, 365205, H03K 3356, H03K 1704
Patent
active
047163208
ABSTRACT:
A CMOS sense amplifier is disclosed which has the capacitance of the bit lines isolated from the sensing nodes, which allows the sensed differential voltage to be amplified faster than in current CMOS sense amplifiers, since the sensing nodes have significantly lower capacitance than the bit lines. The isolation is achieved by connecting the bit lines to only the gates of the upper transistors of the cross-coupled inverters, and by coupling the gates of the lower transistors to the common nodes of the inverters (i.e., the sensing nodes of the sense amplifier). In this way, the bit line voltages causes the cross-coupled inverters to begin switching based on the upper transistor of the inverter coupled to the bit line with the lower voltage being more conductive than the upper transistor of the other inverter; the cross-coupled arrangement of the lower transistor gates to the sensing nodes causes the required amplification and latching action. The bit lines are restored by means of an additional CMOS inverter, for each bit line, where the input of the inverter is connected to the sensing node, and its output is connected to the bit line. Once the differential voltage is amplified at the sensing nodes, the additional inverters drive the bit lines in order to restore the sensed data state at the storage cell.
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patent: 4521703 (1985-06-01), Dingwall
Towler, "Low Input Capacitance Sense Amplifier", IBM T.D.B., vol. 26, No. 7A, Dec. 1983, pp. 3124-3125.
Boysel et al, "Multiphase Clocking Achieves 100-Nsec MOS Memory", Electronic Design News, Jun. 10, 1968, pp. 50-54.
Chin et al, "Sense Latch for One-Device Memory Cell", IBM T.D.B., vol. 15, No. 11, Apr. 1973, pp. 3379-3380.
Gschwendtner et al, "Sense System", IBM T.D.B., vol. 16, No. 12, May 1974, pp. 3960-3961.
Anderson Rodney M.
Hudspeth D. R.
Miller Stanley D.
Texas Instruments Incorporated
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