Abstract: A feedback amplifier includes an operational amplifier having an input end and an output end. A first resistor is coupled with the input end of the operational amplifier. A second resistor has a first end coupled with the input end of the operational amplifier and a second end coupled with the output end of the amplifier. A voltage divider has a first end being operably coupled with the output end of the operational amplifier and a second end being analog grounded. In an embodiment, the feedback amplifier further includes a first switch coupled to the first end of the voltage divider and the output end of the operational amplifier, and a second switch coupled to an internal node of the voltage divider. In an embodiment, the feedback amplifier is configured to provide attenuation when the first switch is open and second switch is closed.

Abstract: A feedback amplifier includes an operational amplifier having an input end and an output end. A first resistor is coupled with the input end of the operational amplifier. A second resistor has a first end coupled with the input end of the operational amplifier and a second end coupled with the output end of the amplifier. A voltage divider has a first end being operably coupled with the output end of the operational amplifier and a second end being analog grounded. In an embodiment, the feedback amplifier further includes a first switch coupled to the first end of the voltage divider and the output end of the operational amplifier, and a second switch coupled to an internal node of the voltage divider. In an embodiment, the feedback amplifier is configured to provide attenuation when the first switch is open and second switch is closed.

Abstract: A high speed data communication link has a circuit for providing a differential signal having first and second opposite phase components and a triaxial cable connected to receive the positive phase component of the signal on the inner conductor and the negative phase signal component on the center conductor which is made of wire mesh. An outer conductor such as a foil tape or wire mesh has a drain wire connected to ground and provides electric field shielding. EMI cancellation is provided by this arrangement particularly where the inner and center conductors have approximately the same resistance.

Abstract: An automatic gain control (AGC) circuit is applied to control a margin voltage of an oscillator. The margin voltage is the voltage difference between a high-level output and a low-level output of the oscillator. The AGC circuit of the present invention includes a comparator and a processing unit. Wherein, the comparator compares the margin voltage of the oscillator and a reference voltage. Based on the output of the comparator, the processing unit outputs a ripple code to determine the value of a driving current output from a current generator. The oscillator generates an oscillation output to the comparator based on the driving current.

Abstract: A system and method for interfacing video devices over a link where electronic digital video data having a quantity (n) of bits of parallel data transmitted electronically at a first clock rate (R1) is converted to a stream of electronic serial data that is transmitted a second clock rate (R2=R1×n). The stream of electronic serial data is transmitted over a link that can be a fiber optic link or include one or more conductors. A receiver is employed to convert the data transmitted over the link into an output data stream having (n) bits of parallel data transmitted electronically at the first clock rate (R1). If the link is a fiber optic link, the receiver can convert the data transmitted over the link into to a second stream electronic serial data that is transmitted at the second clock rate (R2) and then to the output data stream.

Abstract: A system and method for interfacing video devices over a link where electronic digital video data having a quantity (n) of bits of parallel data transmitted electronically at a first clock rate (R1) is converted to a stream of electronic serial data that is transmitted a second clock rate (R2=R1×n). The stream of electronic serial data is transmitted over a link that can be a fiber optic link or include one or more conductors. A receiver is employed to convert the data transmitted over the link into an output data stream having (n) bits of parallel data transmitted electronically at the first clock rate (R1). If the link is a fiber optic link, the receiver can convert the data transmitted over the link into to a second stream electronic serial data that is transmitted at the second clock rate (R2) and then to the output data stream.