Bipolar signal amplification or generation

Details Bipolar signal amplification or generation Bipolar signal amplification or generation

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) H03F 3/217 (2006.01)

Patent

CA 2050215

Abstract of the Disclosure Amplification or generation of very low (and variable) frequency, low voltage, high current bipolar signals useful in electrical borehole telemetry systems is achieved using a duty cycle control device for causing the alternate direct application of a positive voltage and a negative voltage to an integrator. A commutated clamp is connected to the input of the integrator for switchably connecting the integrator directly into a current loop with the load, connected to the output of the integrator, when neither voltage is being applied to the input of the integrator.

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