Abstract: A voltage regulator is configured to receive an input voltage from a power supply, measure a temperature associated with a heat transfer medium, produce an output voltage to drive a thermo-electric cooler, and vary the output voltage in accordance with changes in the measured temperature. Varying the output voltage results in: 1) extracting of heat from the heat transfer medium when the measured temperature is above a threshold value, or 2) supplying of heat to the heat transfer medium when the measured temperature is below a threshold value. The voltage regulator can cap upper and lower bounds of the output voltage to prevent the thermo-electric cooler from reaching its saturation point. The voltage regulator can be configured to produce an output voltage having reduced voltage ripple.

Abstract: A method for negotiating speed between a Fiber Channel (FC) local client and a remote FC client across a DWDM network is provided. A transmission speed of the local FC client at a local ingress transport interface is detected. The data from the local FC client is forwarded along with the detected transmission speed to a remote egress transport interface. The remote egress interface forwards the data at the detected transmission speed to the remote FC client. The present invention eliminates complex speed negotiation state machines that would otherwise be required to make the DWDM transport behave like a virtual wire with respect to the FC ports and to allow the FC clients to negotiate the desired speed directly between themselves.

Abstract: A voltage regulator is configured to receive an input voltage from a power supply, measure a temperature associated with a heat transfer medium, produce an output voltage to drive a thermo-electric cooler, and vary the output voltage in accordance with changes in the measured temperature. Varying the output voltage results in: 1) extracting of heat from the heat transfer medium when the measured temperature is above a threshold value, or 2) supplying of heat to the heat transfer medium when the measured temperature is below a threshold value. The voltage regulator can cap upper and lower bounds of the output voltage to prevent the thermo-electric cooler from reaching its saturation point. The voltage regulator can be configured to produce an output voltage having reduced voltage ripple.