CA3140 and CA3130 are originally RCA part numbers( i feel). They are
amazing close to ideal opamps, the input offset has to be trimmed. I
used to use it when high input impedance is required. 1.5T ohm 10pA is
the specs. A Electrometer can be made with just one opamp.
has the additional Merit of swinging to the rails, if you are on a +/-
12V supply, the output will be +/-12V. This is a feature required in
These devices are now available with Intersil.
CA3140 -4.5MHz, BiMOS Operational Amplifier with MOSFET Input/Bipolar Output
CA3140A and CA3140 BiMOS operational amplifiers feature gate protected
MOSFET (PMOS) transistors in the input circuit to provide very high
input impedance, very low input current, and high speed performance. The
CA3140A and CA3140 operate at supply voltage from 4V to 36V (either
single or dual supply).
A voltage regulator that uses CA3130 - Range 0.1 to 50V at 1 Amp.
CA3130 - 15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output
"15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output
CMOS transistor-pair, capable of swinging the output voltage to within
10mV of either supply-voltage terminal (at very high values of load
impedance), is employed as the output circuit."
Function Generator using the CA3140
Applications - Ground-Referenced Single Supply Amplifiers, Fast Sample-Hold Amplifiers, Long-Duration Timers/Monostables.
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