Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1994-05-09
1996-10-08
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 87, 327 89, 327205, H03K 5153
Patent
active
055635342
ABSTRACT:
A hysteresis comparator circuit working with a low voltage supply and of a type which includes a composite structure incorporating first and second differential cells respectively comprised of an npn bipolar transistor pair with common emitters, on the one side, and a pair of pnp bipolar transistor pair with common emitters, on the other, such cells being coupled together through the bases of the respective transistors. The circuit includes at least one pair of variable current sources associated with each cell and tied operatively to the voltage value present on the comparator output; in addition, a voltage divider is connected between each interconnection of the bases of the transistors forming the cells.
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Allen, Gordon and David Harnishfeger, "Voltage Comparator with Hysteresis Suitable for Low, Supply Referenced Thresholds," Motorola Technical Developments, vol. 12, p. 160, Apr. 1991.
Rossi Domenico
Tateoka Masayuki
Callahan Timothy P.
Carlson David V.
Donohue Michael J.
SGS - Thomson Microelectronics, S.r.l.
Wells Kenneth B.
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