■ GENERAL DESCRIPTION
The NJU7664 is a voltage converter for GaAs FET, which contains CR oscillation circuit and dual operational amplifiers.
The voltage converter is a circuit operated by the charge pumping system, and it generates the negative voltage from the positive power supply. Furthermore the charge pumping capacitor is incorporated.
Both of two operational amplifiers with the gain resistance which is set up at -OdB output the negative voltage by the inverted input voltage.
The NJU7664 realizes to operate the GaAs FET requiring the negative gate biassing.

■ FEATURES
• Voltage Converter Operated With The Charge Pumping System
• Charge Pump Capacitor Incorporated
• CR Oscillation Circuit Incorporated
• Wide Operating Voltage       VDD = 2.7V to 5.2V
• Output Voltage                  0 to -4.0V (VDD = 5.2V)
• Low Operating Current        1.25mA MAX(VDD = 2.7V)
• Stand-by Function
• C-MOS Technology
• Package Outline                 VSP-8