Current amplifiers drive the speakers.

• Solves the output problem.
• Easy to construct.
• Design on paper without an oscilloscope.
• Lower noise and distortion.
• Highest possible efficiency.
• Allows variable gain.
• 10 watt, 32 watt, and 75 watt per channel prototyped.

Precision on smallest capacitors.

• Solves the speed problem.
• Measures in the femtofarad range.
• 1% error on 1 picofarad (usually 50% or more).
• 6 decades of range.
• 10 femtofarads to 4 microfarads.
• High immunity to noise and drift.
• Easy to construct.
• Common op amp circuitry.
• Breadboard it in minutes.

• Tunable frequencies with rythm and resonance.
• Low frequency with complexity for easy listening.
• Temperature stabilized.

• Functions like a mechanical device.
• Immune to outage problems.
• Glitch free.
• Adds controlled timing.

• Measures 2-20 mm with plates of 20 mm diameter.
• One femtofarad per millivolt.

To New Audio Amplifiers
To Femto Capacitance meter
To Background Sound Synthesizer
To High Reliability Thermostat
Capacitative Distance Transducer

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