Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Exponential
Patent
1994-01-18
1995-10-24
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Exponential
327 58, 327 63, H03K 522
Patent
active
054613370
ABSTRACT:
A source of equally spaced timing signals which includes a first signal source providing a first signal tracing an essentially exponential voltage curve, a second signal source including a transistor having a control electrode and an electron flow path therethrough having a voltage drop V.sub.BE thereacross, a voltage source providing a voltage V.sub.CC coupled to one end of the electron flow path, a resistance R.sub.L coupled between the control electrode and the voltage source, the other end of the flow path providing a second voltage signal in accordance with the equation V.sub.i =V.sub.H -I.sub.i R.sub.L for i=1 to n where I.sub.i =(V.sub.H /R.sub.L)(1-e.sup.-i.alpha.) and V.sub.H =V.sub.CC -V.sub.BE and a comparator providing a timing signal whenever the second voltage signal is greater than the first signal.
REFERENCES:
patent: 3906247 (1975-09-01), Heffner
patent: 4229108 (1980-10-01), Childers
patent: 4549098 (1985-10-01), Fushiki
patent: 4712091 (1987-12-01), Schoofs et al.
patent: 4874964 (1989-10-01), Kondo
patent: 5155386 (1992-10-01), Abdi
Brady III Wade J.
Callahan Timothy P.
Donaldson Richard L.
Lam T.
Swayze, Jr. W. Daniel
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