A current to be supplied to a load driven by the current is linearly controlled in accordance with a voltage. A voltage-current converter according to the present invention includes a differential amplifier, a first current mirror, and a voltage setting unit. The differential amplifier receives an input voltage from an input terminal and outputs a voltage in accordance with a difference between the input voltage and a threshold voltage. The first current mirror receives the voltage from the differential amplifier and outputs an output current to an output terminal. The voltage setting unit sets the threshold voltage.

A supply voltage may be set using a local voltage regulator, such as a Digital Linear Voltage Regulators (DLVR). A DLVR may include a compensator, and the performance of the compensator may be affected by a dropout (DO) voltage. To improve the performance of a compensator, a number of compensator calculations may be pre-calculated to reduce the complexity of remaining real-time computations and enable compensator calculations to be completed within a single DLVR clock cycle. A DLVR may include a sense filter, and the DLVR transfer function (TF) may be modified using dynamic shaping of open loop gain and pole locations of a sense filter. The DO range associated with the DLVR TF may be changed according to a monitored DO(t) to reduce the sensitivity of a domain VMIN on dropout, which reduces power consumption, increases performance, and enables simplification of test flows.

A control apparatus and control method for power supply of a communication network are provided. The method includes: detecting circuit data of each power supply circuit, comparing the circuit data of the each power supply circuit to get an average value, and analyzing output circuit data that the each power supply circuit should have; adjusting an output voltage of each power supply circuit according to the output circuit data that each power supply circuit should have; and connecting output voltages of all the power supply circuits in parallel and supplying power to a next stage electrical load.

A device includes a substrate, a first electrode and a second electrode. The first electrode is disposed on the substrate, and configured to receive an input signal. The second electrode is disposed on the substrate, and configured to output an output signal based on the input signal. When the input signal is configured to oscillate within a first range between a first voltage value and a second voltage value with a first frequency, the output signal is an inverted version of the input signal, and has the first frequency. When the input signal is configured to oscillate within a second range including the first voltage value without the second voltage value with the first frequency, the output signal has a second frequency which is approximately twice of the first frequency.

Low-noise current source, configured to be supplied by at least one DC main supply (V.sub.ss) and to deliver an output current (I.sub.L), the source comprising one or more current generator modules (G.sub.1, G.sub.2, . . . G.sub.N) operating in parallel each one of which is configured to deliver a respective output current (I.sub.i), whereby the output current (I.sub.L) of the source is equal to the sum of the output currents (I.sub.i) of said one or more current generator modules (G.sub.1, G.sub.2, . . . G.sub.N), each current generator module (G.sub.1; G.sub.2; . . . G.sub.N) comprising a regulator component (Q1), configured to deliver the output current (I.sub.i) of the current generator module (G.sub.1; G.sub.2; . . . G.sub.N), a sensing resistor (R.sub.s) connected in series to the regulator component (Q1), and an error amplifier stage (IC1), configured to compare a reference voltage (V.sub.ref) with a voltage drop (V.sub.s) across the sensing resistor (R.sub.s), whereby the error amplifier stage (IC1) is configured to amplify an error signal equal to a difference between the between voltage (V.sub.ref) and voltage across the sensing resistor (R.sub.s), the error amplifier stage (IC1) being configured to output the amplified error signal that is configured to control the regulator component (Q1), the current source being characterised in that each current generator module (G.sub.1; G.sub.2; . . . G.sub.N) further comprises a first shunt type regulator (Z1, I1), configured to be connected to said at least one DC main supply (V.sub.ss), that is further configured to generate a dedicated supply voltage supplying the error amplifier stage (IC1), whereby the error amplifier stage (IC1) is configured to be supplied in a floating manner with respect to said at least one DC main supply (V.sub.ss).

Provided is a voltage regulator including a clamp circuit capable of protecting a gate of an output transistor without limiting a drivability of the output transistor. The voltage regulator includes a level shift circuit having an input terminal connected to the gate of the output transistor and an output terminal connected to an input of the clamp circuit. The clamp circuit is controlled by an output voltage of the level shift circuit.

An embodiment voltage-current converter circuit comprises a first amplifier and a second amplifier having homologous first input nodes configured to receive a voltage signal therebetween as well as homologous second input nodes having a resistor coupled therebetween. First and second current mirror circuits are provided comprising first input transistors having their control terminal coupled to the output nodes of the amplifiers. First and second current sensing circuitry having first and second current output nodes are coupled to the current mirror output nodes of the current mirror circuits and configured to provide therebetween a current which is a function of the voltage signal between the homologous first input nodes of the amplifier.

A current mirror circuit includes a current output terminal, a first transistor, a second transistor, and a digital-to-analog converter (DAC). The first transistor includes a first terminal coupled to a power rail, a second terminal coupled to a current source, and a third terminal coupled to the current source. The second transistor includes a first terminal coupled to the power rail, a second terminal coupled to the second terminal of the first transistor, and a third terminal coupled to the current output terminal. The DAC includes an output terminal coupled to the second transistor.

A semiconductor device includes: a voltage generation unit that generates a first voltage having a first temperature characteristic; a constant voltage generation unit that generates a constant voltage; and an adjustment unit that generates a second voltage having a second temperature characteristic and a third voltage having a third temperature characteristic using the first voltage and the constant voltage. The constant voltage generation unit generates the constant voltage independently of the adjustment unit. One of the second and third temperature characteristics is an opposite characteristic to the first temperature characteristic. The device can also include a control unit that selects one of the second and third voltages in response to a predetermined setting value.

Provided is a current-to-voltage conversion circuit, including: an input/output node configured to input a current signal including a direct current component and an alternating current component, and to output a voltage based on the current signal; an amplification unit configured to input the voltage of the input/output node; an extraction unit configured to output a voltage based on a direct current component of a voltage output from the amplification unit; a first current supply unit configured to supply a current based on the voltage output from the extraction unit to the input/output node; and a second current supply unit configured to supply a current based on the alternating current component of the current signal to the input/output node. The current supplied by the second current supply unit corresponds to a difference between a current of the current signal and the current supplied by the first current supply unit.