Abstract: Aspects of the subject technology relate to a system and method for preventing voltage sagging using an Oring-FET in a redundant power supply configuration. Each redundant power supply includes an Oring-FET and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the Oring-FET during power up. In the event input voltage is less than the output voltage, the Oring-FET is deemed to be operating properly and provides output to a communicatively coupled system bus in response to the input voltage reaching a predetermined voltage threshold level. In the event the input voltage is approximately equal to the output voltage, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus and prevents voltage sagging on the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.

Abstract: Aspects of the subject technology relate to a system and method for preventing voltage sagging using an Oring-FET in a redundant power supply configuration. Each redundant power supply includes an Oring-FET and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the Oring-FET during power up. In the event input voltage is less than the output voltage, the Oring-FET is deemed to be operating properly and provides output to a communicatively coupled system bus in response to the input voltage reaching a predetermined voltage threshold level. In the event the input voltage is approximately equal to the output voltage, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus and prevents voltage sagging on the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.

Abstract: A system and method for preventing bus voltage sagging when an Oring-FET in an N+1 redundant power supply configuration is faulty during power up. Each redundant power supply includes an Oring-FET and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the Oring-FET during power up. In the event input voltage is less than the output voltage, the Oring-FET is deemed to be operating properly and provides output to a communicatively coupled system bus in response to the input voltage reaching a predetermined voltage threshold level. In the event the input voltage is approximately equal to the output voltage, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus and prevents voltage sagging on the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.

Abstract: A radio-frequency ablation electrode device with double-layered umbrella-shaped probes. The ablation electrode device comprises a temperature measuring tube (7) and a sleeve (5) sleeved outside of the temperature measuring tube (7). The head of the temperature measuring tube (7) is fixed to a first set of umbrella-shaped probes (8) in a welding mode, and a first fastening pipe (10) is fastened to the first set of probes (8) in a welding mode. The outside of the rear portion of the first set of probes (8) is coated with an insulating material layer, the outside of the insulating material layer is fixedly connected with a second set of umbrella-shaped probes (9), and a second fastening pipe (11) is fastened to the second set of probes (9) in a welding mode. The first set of probes (8), the human body and the second set of probes (9) form a radio-frequency current circuit.

Abstract: A system and method for preventing bus voltage sagging when an Oring-FET in an N+1 redundant power supply configuration is faulty during power up. Each redundant power supply includes an Oring-FET and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the Oring-FET during power up. In the event input voltage is less than the output voltage, the Oring-FET is deemed to be operating properly and provides output to a communicatively coupled system bus in response to the input voltage reaching a predetermined voltage threshold level. In the event the input voltage is approximately equal to the output voltage, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus and prevents voltage sagging on the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.

Abstract: A Passive Optical Network (PON) is provided with capability for multiple protocols and service suppliers by employing Wavelength Division Multiplexer (WDM) elements in combination with optical couplers at optical distribution nodes (ODN) intermediate a local exchange office and a customer node. The local exchange office node transmitting and receiving signals from a single optical fiber through a WDM providing M/2 wavelength pairs for use with differing protocols and each customer node connected to one leg of an optical coupler in the ODN with a WDM associated with one of the wavelength pairs for received and transmitted signals.

Abstract: A Passive Optical Network (PON) is provided with enhance split capability and bandwidth by employing Wavelength Division Multiplexer (WDM) elements in combination with optical couplers at optical distribution nodes (ODN) intermediate a local exchange office node and a customer node. The local exchange office node transmitting and receiving signals from a single optical fiber through a WDM and each customer node connected to one leg of an optical coupler in the ODN with a WDM for received and transmitted signals. Upstream transmission is accomplished with a single wavelength.

Abstract: An electronic ballast for igniting and maintaining a discharge arc in a discharge tube of a ceramic metal halide lamp wherein a resistance of the discharge tube varies with a temperature of the discharge tube during operation. It is desirable to energize the discharge tube with a substantially constant value to prevent changes in color of the light emitted by the discharge tube that result from changes to the power applied to the discharge tube. The ballast includes ballast circuitry having an inverter circuit driving an LC tank network coupled to the discharge tube. The LC tank network applies a time varying voltage to the discharge tube wherein a peak-to-peak magnitude of the time varying voltage applied by the LC tank network is determined by a frequency of oscillation of the inverter circuit.

Abstract: A hot restrike protection circuit provides complete shut down protection for a self-oscillating high intensity discharge lamp ballast of the type comprising a pair of complementary switching devices in a bridge configuration with a gate drive inductor in series with a second inductor, i.e., a control inductor, at the junction between the switching devices. The hot restrike protection circuit effectively comprises a three-terminal device for coupling across the control inductor. In particular, the HRP circuit comprises a sensing network for sensing voltage across the control inductor, a breakdown network for providing a breakdown path upon reaching a predetermined restrike voltage threshold across the control inductor, and a shutdown network for shutting down operation of the ballast until the lamp is sufficiently cool for restarting, thereby protecting ballast components during hot restrike, or re-ignition, of the lamp.