摘要:
An embodiment of the invention relates to a controller that includes a delta-sigma modulator to produce a one-bit, oversampled signal representing a measured characteristic of a process, and a delta-sigma modulator to produce a one-bit, oversampled signal representing a set-point value for the characteristic. A multiplexer selects a partial sum based on a difference of the oversampled signals to produce a control signal for the process. The controller that produces the control signal for the process can be a PID controller.
摘要:
Current regulators and related method for regulating a current through a load. The current regulator may include, for example, a first circuit configured to determine an amount of current that flows through the load; and a second circuit configured to cause a voltage to be applied across the load, the voltage having a duty cycle that depends on the amount of the current flowing through the load.
摘要:
An embodiment of the invention relates to a controller that includes a delta-sigma modulator to produce a one-bit, oversampled signal representing a measured characteristic of a process, and a delta-sigma modulator to produce a one-bit, oversampled signal representing a set-point value for the characteristic. A multiplexer selects a partial sum based on a difference of the oversampled signals to produce a control signal for the process. The controller that produces the control signal for the process can be a PID controller.
摘要:
A digital phase-locked loop is provided having a minimal transient recovery time for emitting an output clock signal which is synchronous with a reference clock signal in a normal operating state of the digital phase-locked loop. The phase-locked loop can include a phase detector for identifying a phase deviation between the reference clock signal and a feedback clock signal. Further, the phase-locked loop can include a resettable counter, which generates a digital phase deviation signal corresponding to the identified phase deviation. The phase-locked loop can also include a resettable digital filter for filtering the digital phase deviation signal. Further, the phase-locked loop can include an oscillator circuit for generating the output clock signal as a function of a filtered digital phase deviation signal. The phase-locked loop can also include a resettable feedback frequency divider which divides the output clock signal for generating the feedback clock signal.
摘要:
Current regulators and related methods for regulating a current through a load. The current regulator may include, for example, a first circuit configured to determine an amount of current that flows through the load; and a second circuit configured to cause a voltage to be applied across the load, the voltage having a duty cycle that depends on the amount of the current flowing through the load.