GS3019

The hybrid consists of Gennum's LS509 class A amplifier,four capacitors, and two selectable bias resistors. This hybrid GS3019 is very similar to Gennum's 3010 with the exception that capacitors C2 and C3 on the GS3019 have been increased in value to extend the frequency response of the system.

This hybrid GS3019 is very similar to Gennum's 3010 with the exception that capacitors C2 and C3 on the GS3019 have been increased in value to extend the frequency response of the system. C2 and the output impedance of the microphone form a high pass filter with a corner frequency of approximately 180 Hz. The hybrid allows for easy adjustment of this corner frequency via the addition of components to its many additional solder pads. Likewise,R3 and C3 form a high pass filter with a corner frequency of 130 Hz. Altering this frequency is easily accomplished by adding additional capacitance between pads 12 and 2 on the hybrid.

Stage C of the LS509 is a class A current drive output. There is a fixed reference voltage of typically 29 mV at pin 2 of the chip (pad 5 of the hybrid). The current that flows in the receiver is the ratio of this 29 mV reference voltage to the resistance seen from pin 2 to ground. R1 and R2 have been included on the GS3019 to allow for easy adjustment of the current for the most commonly used receivers.

The system GS3019 also has the capability of MPO (Maximum Power Output) control. This is provided by the Schottky diodes on
the LS509 die. To make use of the diodes in the system, a potentiometer must be added from pads 7 to 9 on the hybrid.