Amplifiers – With periodic switching input-output
Patent
1981-03-03
1983-09-13
Mullins, James B.
Amplifiers
With periodic switching input-output
330107, 328167, H03F 134
Patent
active
044045255
ABSTRACT:
An operational amplifier gain stage utilizing switched capacitor resistor equivalent circuits is designed utilizing a delayed clock reference signal (.phi..sub.D, .phi..sub.D) in a unique manner, thereby eliminating the effects of spurious error voltages (E.sub.S) generated when utilizing metal oxide silicon field effect transistors as switches (12, 15, 21, 23, 25). The single remaining MOSFET switch (21) which will contribute a spurious voltage component to the output of the operational amplifier gain stage is designed in such a manner as to minimize the spurious voltage generated during operation of the MOSFET switch. A single dummy switch (31) is utilized to further minimize the spurious voltage generated by this single MOSFET switch.
REFERENCES:
patent: 4297642 (1981-10-01), Baldwin et al.
"Analog Circuit Performance Improves with MOS/CMOS Techniques", Bingham, 8080 Wescon Conference Record, vol. 24, (1980), Sep. 16-18, Anaheim, California USA, pp. 1-14.
"Spannungsspitzen bei MeBzerhackern mit Feldeffekt-Transistoren", article by M. Seifart, KDT, Magdeburg.
Young et al., "Analog NMOS Sampled-Data Recursive Filter", 1977 IEEE International Solid-State Circuits Conference, Feb. 17, 1977, pp. 156, 157.
Amir Gideon
Gregorian Roubik
Haque Yusuf
American Microsystems, Inc.
Caserza Steven F.
Franklin Richard
MacPherson Alan H.
Mullins James B.
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