Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2006-05-23
2006-05-23
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S563000
Reexamination Certificate
active
07049858
ABSTRACT:
An isolation resistor is inserted in series between a current source and the emitters of bipolar switching transistors in a differential amplifier. The switching transistors may also be MOSFETs. The in-rush current through the resistor, due to a parasitic or added capacitance, creates a certain increased voltage drop across the resistor, reducing dv/dt and thus reducing the transient in-rush current into the capacitor. This results in reduced waveform distortion. Such an isolation resistor between a current carrying terminal of a switching bipolar transistor and a current source may be used in various applications, including an emitter follower.
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Chan Benjamin
Thai Phi
Wong Thomas S.
Micrel Inc.
Ogonowsky Brian D.
Patent Law Group LLP
Wells Kenneth B.
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