A high impedance Field Effect Transistor input stage with good d.c. stability.
D000200:Action Potentials; D000818:Animals; D001001:Anura; D003365:Costs and Cost Analysis; D004582:Electronics, Medical; D004594:Electrophysiology / Q000295:instrumentation; D005725:Ganglia, Autonomic / Q000502:physiology; D008564:Membrane Potentials; D012584:Sciatic Nerve / Q000502:physiology