Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1995-10-31
1998-05-05
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327312, 327321, 327328, 327389, 326 27, H03K 508, H03K 1716
Patent
active
057480222
ABSTRACT:
An input circuit which prevents erroneous operation caused by noise. An input stage has a NMOS transistor N11 and a PMOS transistor P11. A NMOS transistor N12 is connected in series between a ground line and the source of the NMOS transistor N11. A PMOS transistor P12 coupled to a voltage supply line V.sub.cc acts as a current control element. NMOS transistors N13 and N14 are connected in series between the ground line and the drain of PMOS transistor P12. Inverters IV11 and IV12 delay the voltage of an intermediate output node S11 and supply it to the gate of NMOS transistor N13. The gate of NMOS transistor N12 is coupled to a node S13, the gate of NMOS transistor N14 is coupled to the input line for an input signal IN, and node S13 is formed to function as a voltage sensor with respect to the ground.
REFERENCES:
patent: 4570083 (1986-02-01), Nakaizumi
patent: 4983861 (1991-01-01), Kikuchi et al.
patent: 5066875 (1991-11-01), Ueno et al.
patent: 5103118 (1992-04-01), Peterson
patent: 5347179 (1994-09-01), Casper et al.
Callahan Timothy P.
Donaldson Richard L.
Kempler William B.
Texas Instruments Incorporated
Wells Kenneth B.
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