DESCRIPTION
The GP509 is a Class A amplifier utilizing Gennum’s proprietary low voltage JFET technology. It consists of a singleended, low noise inverting gain block, a Class A output stage, and an on-chip microphone decoupling resistor

FEATURES
• low amplifier current (typical 105 µA)
• low noise and distortion
• 1.0 to 5 VDC operating range
• independent preamplifier
• Class A output stage
• variable transducer current
• 4.0 kΩ microphone decoupling resistor, on-chip