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GaAsFET amplifier connected with wrong bias polarity voltages

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afz23

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I am using GaAsFET amplifier FLC107 from Sumitomo,it requires -ve gate bias and +very drain bias voltages for its operation.
By mistake my technician reversed the gate and drain wires,i. e drain received -ve
and gate received +ve DC supply.-5v and +2v to be specific.
I thought device might have been damaged by reversing the polarities,but when
correct DC supply were again connected to verify,the device worked perfectly alright and drew the specified current.
I want to know the reason,still whether this device can be used with reliability in any application,or this device is degraded by reversing the polarity.
 
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BigBoss

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You'd better to change if it doesn't cost too much.Schottky diode at the gate may be damaged...
 

afz23

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Biff44 can you please suggest reverse bias protection circuitry for high and medium power GaAsFET devices

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Usually scottky diode at gate gets damaged at which positive voltage?
I am using a 10k series resistor with gate,may be this has saved my device.
 

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