Abstract: Disclosed is a power supply switching circuit comprising: a first switch pair configured to selectively connect a first power supply node to an output node; a second switch pair configured to selectively connect a second power supply node to the output node; and a switch control circuit configured to: respectively control first and second switches of the first switch pair by a first control signal and a second control signal; respectively control first and second switches of the second switch pair by a third control signal and a fourth control signal; and selectively connect one of the first power supply node or the second power supply node to the output node by at least one of (a) the first and second control signals or (b) the third and fourth control signals. At least one of the second control signal or the fourth control signal is powered via the output node.

Abstract: Disclosed is a circuit for controlling a single-inductor multiple-output voltage regulator. The voltage regulator includes the single inductor and is configured to generate an independent regulated voltage at each of a plurality of outputs. The circuit includes: a plurality of output switches configured to selectively respectively connect each of the plurality of outputs to a first inductor terminal of the inductor; and a controller configured to control the plurality of output switches in a plurality of switching periods such that, in an operational state, each of the plurality of outputs is periodically connected to the first inductor terminal for a respective connected time duration to generate the regulated voltage at a corresponding output.

Abstract: In some embodiments, a threshold calibration system to provide a zero voltage switching signal is presented. The system includes a divider coupled to a switching node; a calibration ramp generator; a reference voltage generator; a comparator; a first multiplexer coupled to receive a divider output signal from the divider and a calibration ramp signal from the calibration ramp generator and provide a signal to the comparator based on a calibration enable signal; a second multiplexer coupled to receive reference voltages from the reference voltage generator, the second multiplexer provided a threshold signal to the comparator; and a digital feedback circuit receiving an output signal from the comparator and providing the zero voltage switching signal.

Abstract: Disclosed is a power supply switching circuit comprising: a first switch pair for selectively connecting a first power supply node to an output node, a second switch pair for selectively connecting a second power supply node to the output node; and a switch control circuit. The switch control circuit is operable such that a first switch of each of the first switch pair and the second switch pair is controlled by a respective first control signal and a second switch of each of the first switch pair and the second switch pair is controlled by a respective second control signal, so as to connect no more than one of the first power supply node or the second power supply node to the output node at any one time.

Abstract: Disclosed is a power supply switching circuit comprising: a first switch pair configured to selectively connect a first power supply node to an output node; a second switch pair configured to selectively connect a second power supply node to the output node; and a switch control circuit configured to: respectively control first and second switches of the first switch pair by a first control signal and a second control signal; respectively control first and second switches of the second switch pair by a third control signal and a fourth control signal; and selectively connect one of the first power supply node or the second power supply node to the output node by at least one of (a) the first and second control signals or (b) the third and fourth control signals. At least one of the second control signal or the fourth control signal is powered via the output node.

Abstract: Disclosed are control circuits for a SIMO voltage regulator, and associated voltage regulators. The control circuit comprises output switches for selective connection of each output to a first inductor terminal; and a controller. In an embodiment, the controller such that each output is periodically connected to the first inductor terminal for a respective connected time duration which are each dependent on at least one historical voltage value sampled in an earlier switching period on at least one of the outputs. In another embodiment, the output for which at least a first portion of its corresponding connected time duration is first calculated is periodically switched. In yet another embodiment, it is determined whether the SIMO is in a locked condition; whether the locked condition is valid; and if invalid, a respective alternative voltage regulator is used to supply one or more of the outputs.

Abstract: Disclosed is a power supply switching circuit comprising: a first switch pair for selectively connecting a first power supply node to an output node, a second switch pair for selectively connecting a second power supply node to the output node; and a switch control circuit. The switch control circuit is operable such that a first switch of each of the first switch pair and the second switch pair is controlled by a respective first control signal and a second switch of each of the first switch pair and the second switch pair is controlled by a respective second control signal, so as to connect no more than one of the first power supply node or the second power supply node to the output node at any one time.

Abstract: A voltage converter includes a high voltage regulator, a buck converter and a dual input linear regulator unit. The high voltage regulator converts a rectified voltage to a first load voltage. The rectified voltage is rectified from an input voltage. The buck converter generates an output voltage having a first level based on the rectified voltage during a stabilizing period and provides a transition detection signal that is enabled when the output voltage transitions to the first level. The stabilizing period is successive to an initializing period. The dual input linear regulator unit receives the first load voltage, the output voltage and a reference voltage, generates a second load voltage based on the first load voltage during the initializing period, and generates the second load voltage based on the output voltage during the stabilizing period.

Abstract: A rectifier circuit includes a low side switching circuit, a high side switching circuit and a low side driver. The low side switching circuit is connected between a reference node and first and second input nodes. The first and second input nodes receive an alternating current (AC) voltage. The high side switching circuit is connected between an output node and the first and second input nodes. The output node outputs a rectified voltage of the AC voltage. The low side driver is coupled to the low side switching circuit. The low side driver controls, in response to a control signal, the low side switching circuit so that the low side driving voltage and a voltage provided from one of the first and second input nodes are synchronized in phase.

Abstract: A voltage converter includes a high voltage regulator, a buck converter and a dual input linear regulator unit. The high voltage regulator converts a rectified voltage to a first load voltage. The rectified voltage is rectified from an input voltage. The buck converter generates an output voltage having a first level based on the rectified voltage during a stabilizing period and provides a transition detection signal that is enabled when the output voltage transitions to the first level. The stabilizing period is successive to an initializing period. The dual input linear regulator unit receives the first load voltage, the output voltage and a reference voltage, generates a second load voltage based on the first load voltage during the initializing period, and generates the second load voltage based on the output voltage during the stabilizing period.

Abstract: An electronic device for rapidly tuning a voltage controlled oscillator to the radar carrier frequency of each of the individual radar pulses. A frequency discriminator (1) of the quadricorrelator type is supplied with the incoming pulses and with the output of the VCO (5) to provide the control voltage to the VCO (5) via amplifying stages (2), (4) and a sample-and-hold circuit (3) that maintains the tuned frequency for time durations greater than 100 usec. The operating frequency range of the device is between 6GHz-18GHz.

Abstract: A system for the automatic correction of the nodding elevation errors for radars tracking targets at low height, comprising in a conventional mode a receiving and transmitting group associated with an intermediate frequency channel and with an antenna servo in azimuth and elevation, having a channel of azimuth error and a channel of elevation error, comprising means for detecting the variations of the amplitude of the echo signal due to the multiple reflection effected at low height and means for subtracting the signal formed by said variations from the channel of elevation error of the antenna servo.

Abstract: A device for controlling the conical scanning frequency of conical scanning radar systems. An antenna illuminator is caused to revolve by means of a three-phase asynchronous rotary field motor. The angular frequency of conical scanning is changed in a random or pseudo-random manner by means of a reference generator associated with the asynchronous motor, a random or pseudo-random signal generator, and a circuit comparing the signal of the reference generator and the signal of the signal generator. The comparison circuit provides "greater," "less" and "equal" outputs. A switching device driven by those outputs couples a braking magnetic-field or the three-phase supply to the motor, depending upon whether a "greater" or "less" output, respectively is the present comparison circuit. The "equal" output also controls the change of state for the random or pseudo-random signal generator.