A method includes: selectively generating a first current by a first current generating circuit according to a first control signal; generating a second current by a second current generating circuit; and comparing a first input signal and a second input signal at a common node to generate an output signal according to the first current, the second current, and a second control signal. The second control signal and the first control signal are in-phase with each other.

A method includes: selectively generating a first current by a first current generating circuit according to a first control signal; generating a second current by a second current generating circuit; and comparing a first input signal and a second input signal at a common node to generate an output signal according to the first current, the second current, and a second control signal. The second control signal and the first control signal are in-phase with each other.

The present disclosure relates to a voltage regulation apparatus, a chip and an electronic device. The apparatus comprises: a voltage output module; a first voltage generation module; a second voltage generation module; a voltage regulation module used for regulating a first comparison voltage according to an input voltage so that the first voltage generation module outputs a regulated first comparison voltage, or regulating a second comparison voltage according to the input voltage so that the second voltage generation module outputs a regulated second comparison voltage; and a control signal generation module used for outputting a control signal according to the regulated first comparison voltage or the regulated second comparison voltage, so that the voltage output module obtains an output voltage according to the control signal and the input voltage. The apparatus of the present disclosure can quickly respond to the change of the input voltage, regulate the control signal and improve the line voltage transient response, so that the voltage output module can still provide a stable output when the input voltage changes.

The present disclosure relates to a voltage regulation apparatus, a chip and an electronic device. The apparatus comprises: a voltage output module; a first voltage generation module; a second voltage generation module; a voltage regulation module used for regulating a first comparison voltage according to an input voltage so that the first voltage generation module outputs a regulated first comparison voltage, or regulating a second comparison voltage according to the input voltage so that the second voltage generation module outputs a regulated second comparison voltage; and a control signal generation module used for outputting a control signal according to the regulated first comparison voltage or the regulated second comparison voltage, so that the voltage output module obtains an output voltage according to the control signal and the input voltage. The apparatus of the present disclosure can quickly respond to the change of the input voltage, regulate the control signal and improve the line voltage transient response, so that the voltage output module can still provide a stable output when the input voltage changes.

A circuit includes an electronic switch configured to be coupled intermediate a high-voltage node and low-voltage circuitry and configured to couple the low-voltage circuitry to the high-voltage node. A voltage-sensing node is configured to be coupled to the high-voltage node via a pull-up resistor. A further electronic switch can be switched to a conductive state to couple the voltage-sensing node and the control node of the electronic switch. A comparator compares a threshold with a voltage at the voltage-sensing node and causes the further electronic switch to switch on in response to the voltage at said voltage-sensing node reaching said threshold. A charge pump coupled to the current flow-path of the electronic switch is activated to the conductive state to pump electric charge from the current flow-path of the electronic switch to the control node of the electronic switch via the further electronic switch switched to the conductive state.

A circuit includes an electronic switch configured to be coupled intermediate a high-voltage node and low-voltage circuitry and configured to couple the low-voltage circuitry to the high-voltage node. A voltage-sensing node is configured to be coupled to the high-voltage node via a pull-up resistor. A further electronic switch can be switched to a conductive state to couple the voltage-sensing node and the control node of the electronic switch. A comparator compares a threshold with a voltage at the voltage-sensing node and causes the further electronic switch to switch on in response to the voltage at said voltage-sensing node reaching said threshold. A charge pump coupled to the current flow-path of the electronic switch is activated to the conductive state to pump electric charge from the current flow-path of the electronic switch to the control node of the electronic switch via the further electronic switch switched to the conductive state.

A comparing device includes a first current generating circuit arranged to selectively generate a first current and a second current different from the first current, according to a first control signal. The comparing device also includes a comparing circuit having a common node coupled to the first current generating circuit for comparing a first input signal and a second input signal to generate an output signal according to the first current, the second current, and a second control signal. The second control signal and the first control signal are in-phase with each other.

A comparing device includes a first current generating circuit arranged to selectively generate a first current and a second current different from the first current, according to a first control signal. The comparing device also includes a comparing circuit having a common node coupled to the first current generating circuit for comparing a first input signal and a second input signal to generate an output signal according to the first current, the second current, and a second control signal. The second control signal and the first control signal are in-phase with each other.

A system for controlling and regulating the AC voltage level delivered to a load regardless of the varying input AC voltage comprises a high frequency AC series voltage regulator coupled with a low frequency operating mains transformer. In one embodiment, the LF operating mains transformer operates at electrical mains frequency, which is typically 50 Hz or 60 Hz. The magnetic core of the LF operating mains transformer may be made of industry standard low frequency core material selected from a material group including silicon steel and amorphous core such as ‘Metglass’. The AC series voltage regulator is connected to the primary of the LF operating mains transformer, and the secondary of the LF operating mains transformer is connected in series between the mains input (which receives the unregulated input AC voltage to be regulated) and its output (which outputs the regulated AC voltage to the loads).

A system for controlling and regulating the AC voltage level delivered to a load regardless of the varying input AC voltage comprises a high frequency AC series voltage regulator coupled with a low frequency operating mains transformer. In one embodiment, the LF operating mains transformer operates at electrical mains frequency, which is typically 50 Hz or 60 Hz. The magnetic core of the LF operating mains transformer may be made of industry standard low frequency core material selected from a material group including silicon steel and amorphous core such as ‘Metglass’. The AC series voltage regulator is connected to the primary of the LF operating mains transformer, and the secondary of the LF operating mains transformer is connected in series between the mains input (which receives the unregulated input AC voltage to be regulated) and its output (which outputs the regulated AC voltage to the loads).