Adaptive reference voltage generation circuit for PLA sense ampl

Details Adaptive reference voltage generation circuit for PLA sense ampl Adaptive reference voltage generation circuit for PLA sense ampl

1989-06-12

1991-03-26

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

365201, 365185, 364716, 307468, 3072966, H03K 1977, G06F 1126, G11C 700, G11C 2900

Patent

active

050032038

ABSTRACT:
An adaptive reference voltage generation circuit. The invention generates a reference voltage for a sense amplifier to provide bias voltages for cells in a PAL type programmable logic array. The circuit of the invention includes a reference cell having characteristics substantially similar to the cells of the array. A reference voltage supply circuit is included for providing a reference voltage in response to any changes in the characteristics of the reference cell. In accordance with the method of the invention, the reference cell is programmed and erased whenever the cells in the array are programmed and erased. Thus the characteristics of the reference cell change in accordance with changes in the characteristics of the cells of the array. As the reference voltage of the circuit of the present invention changes inversely with changes in the characteristics of the reference cell, the circuit of the invention effectively compensates for changes in the characteristics of the cells in the array due to program and erase cycling thereof.

REFERENCES:
patent: 4745579 (1988-05-01), Mead et al.
patent: 4766569 (1988-08-01), Turner et al.
patent: 4855954 (1989-08-01), Turner et al.
patent: 4879688 (1989-11-01), Turner et al.
patent: 4896296 (1990-01-01), Turner et al.

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