A method for determining a waveform expected to be received by a device under test, the method including outputting a waveform generated by a waveform generation section of an arbitrary waveform and function generator at an output of the arbitrary waveform and function generator; sending the waveform generated by the waveform generation section to the device under test through a cable; monitoring a waveform at the output by a waveform monitoring section of the arbitrary waveform and function generator; and determining by the waveform monitoring section a transformed waveform expected to be received at the device under test based on the generated waveform being modified by the cable.

A wideband amplifier includes a first diplexer receiving broadband input signals and divides them by frequency into a low band input signal and a high band input signal. The amplifier has separate high band and low band amplifiers coupled to amplify the low and high band input signals, and a second diplexer coupled to combine outputs of the low and high band amplifiers to form a wideband output. A method of amplification of an input signal includes separating the input signal into high and low band signals, separately amplifying the high and low band signals, and combining amplified high and low band signals into an output signal.

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

A method of manufacturing an RF switch includes adding a first mutual inductance portion to a first self-inductance portion of a first transmission line; and adding a second mutual inductance portion to a second self-inductance portion of a second transmission line, wherein values of the first and second mutual inductance portions and values of the first and second self-inductance portions equalize an impedance difference between the first transmission line and the second transmission line.

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.

Circuits for a receiver, comprising: M first mixers that each receive an input signal, that are each clocked by a different phase of a first common clock frequency, and that each provide an output, wherein M is a count of the first mixers; and M sets of N second mixers, wherein N is a count of the second mixers in each of the M sets, wherein each second mixer in each set of N second mixers receives as an input the output of a corresponding one of the M first mixers, wherein each of the N second mixers in each of the M sets are clocked by a different phase of a second common clock frequency, and wherein each of the second mixers has an output.

Certain aspects of the present disclosure provide methods and apparatus for equalizing a transmitter circuit for use in high-speed data links, such as in a serializer/deserializer (SerDes) scheme. One example transmitter circuit generally includes at least one driver stage, a first equalization circuit coupled to an output of the transmitter circuit, and a second equalization circuit coupled to an input of the at least one driver stage. One example method of transmitting data generally includes operating a transmit circuit comprising: at least one driver stage, a first equalization circuit coupled to an output of the transmitter circuit, and a second equalization circuit coupled to an input of the at least one driver stage; and selectively enabling at least one of the first equalization circuit or the second equalization circuit.

A circuit for a bus system. The circuit includes: a measuring circuit, which is configured to measure a first resistance value between two bus-side terminals of the circuit; an ascertainment circuit, which is configured to ascertain a second resistance value as a function of the first resistance value; and a resistive circuit, which is configured to set a resistor connectable between the two bus-side terminals to the second resistance value.