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155-0076-00: Difference between revisions
→Output Logic
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This current is applied to a leaky integrator. | This current is applied to a leaky integrator. | ||
The electrical time constant of the leaky integrator matches the thermal time constant | The electrical time constant of the leaky integrator matches the thermal time constant | ||
of the most vulnerable parts of the 50 Ω input attenuator. | of the most vulnerable parts of the 50 Ω input attenuator. | ||
In the case of the 11A52, this is a simple RC circuit with a time constant of 294 milliseconds. | |||
The voltage at pin 1 (base of Q33) is inversely related to the modeled temperature of the attenuator. | The voltage at pin 1 (base of Q33) is inversely related to the modeled temperature of the attenuator. | ||
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This turns on Q32. | This turns on Q32. | ||
Thus, the collector current of Q32 is essentially a digital signal: on means overload, off means no overload. | Thus, the collector current of Q32 is essentially a digital signal: on means overload, off means no overload. | ||
==Used in== | ==Used in== | ||