Abstract: A voltage control system that provides an output voltage of constant value to a load. The control system includes voltage supply means for providing the output voltage to the load. A feedback circuit supplies a feedback current. A summing circuit algebraically sums the feedback current and a reference current to provide an error signal that changes as the feedback current changes. These changes affect the amplitude of the output voltage delivered to the load. The error signal is processed by a voltage adjustment means including an error amplifier that amplifies the error signal for use in making an adjustment to the output voltage so as to maintain its constant value. A gain increasing means responds to transient changes in output voltage to momentarily increase the error amplifier gain to shorten system recovery time to constant output voltage.

Abstract: A stable voltage regulator circuit of simple circuit configuration 174,222 includes a differential amplifier (M2, M3) which is powered from a supply line (1) at a nominal voltage level (Vin), by being coupled between the supply line and a return line (2). A reference device (M1) is coupled to a first input (4) of the differential amplifier (M2, M3) for defining a desired output voltage (Vca) on an output line (3) coupled to an output (6) of the differential amplifier (M2, M3). The differential amplifier (M2, M3) is coupled to the return line (2) by a varying current source (M4) which feeds a varying bias current to the differential amplifier (M2, M3) and which is controlled from the supply line (1) in accordance with variations in the nominal voltage level (Vin) on the supply line (1). The varying bias current to the differential amplifier (M2, M3) provides a first-order compensation of the output voltage (Vca) for these voltage variations on the supply line (1).

Abstract: Method for regulating a plurality of output voltages of a converter, of which a first output voltage controls the converter and further output voltages are kept constant by readjusting elements, it being the case that when a prescribed voltage difference across the readjusting element is exceeded, the converter is controlled by a control loop, proceeding from the respective readjusting element.

Abstract: An improved low-dropout ("LDO") voltage regulator incorporates a transient response boost circuit which is added to the slew-rate limited node at the control terminal of the LDO voltage regulator output transistor and provides improved transient response performance to the application of various load current step stimuli while requiring no standby or quiescent current during zero output current load conditions. The transient boost circuit supplies current to the slew-rate limited node only upon demand and may be constructed as either a localized positive feedback loop or a number of switching devices which conduct current only during slew-rate conditions.

Abstract: A voltage regulator capable of improving system response. The voltage regulator includes a feedback circuit and an operational amplifier. The input terminal of the feedback circuit is coupled to an output voltage terminal for attenuating signals coming out of the output terminal. The operational amplifier comprises a pre-amplifier, a clamping circuit and a power amplifier, all serially connected together. The input terminals of the pre-amplifier are respectively coupled to the output terminal of the feedback circuit and an input voltage terminal. The pre-amplifier is a device for amplifying differential voltage between input voltage signals and feedback voltage signals. The clamping circuit is a device for clamping amplified differential voltage from the pre-amplifier between a pre-defined voltage range. The power amplifier is a device for increasing the power of the differential voltage signals.

Abstract: The present invention provides a series control type regulator which can decrease rapidly an output voltage regardless of heaviness or lightness of a load when a first transistor for controlling an output voltage is set to a state of stop of operation. When a switching circuit sets the first transistor from a state of operation to a state of stop, at the same time an output capacitor is discharged by causing to a discharge circuit connected in parallel to the output capacitor. The discharge circuit starts operating by turning on a third transistor, which turns on by a current flowing to voltage dividing resistors of a detection circuit being used as a base current. The voltage dividing resistors of the detection circuit are also used as resistors for setting a base current of the third transistor.

Abstract: A power supply with a programmable voltage slew rate is disclosed for generating a regulated voltage at a predetermined set-point. The power supply includes a programmable current source for generating a controllable level of current flow and a capacitive element coupled to the current source. The capacitive element is responsive to the current flow to establish a reference voltage that varies linearly with respect to variations in the current flow. The power supply additionally includes a power device having a control element disposed in sensed communication with the reference voltage and an output for driving a load. The output is operative to generate an output voltage following that of the reference voltage.

Abstract: A voltage drop compensating circuit is disclosed which compensates for unwanted voltage drops along a DC current conductor connected to an integrated circuit. The compensating circuit includes a differential amplifier connected between a voltage supply and the conductor form the integrated circuit which is marred by the voltage drop. One input terminal of the amplifier is connected to the supply lead and an output terminal of the amplifier is connected to the conductor. A feedback network is connected between another input terminal of the amplifier and the integrated circuit. A potential difference between the two input terminals on the amplifier will lead to the amplifier adjusting a potential on the output terminal until the unwanted voltage drop along the conductor is compensated for.

Abstract: A voltage control unit is provided to continuously monitor a reference output voltage by using a voltage monitoring circuit. When the reference output voltage is lower than a predetermined value, a pair of series transistors are turned ON by a detection output to thereby pull up the reference output voltage to the power supply voltage, and further to pull up the reverse phase input voltage to the reference output voltage. Then, the control is carried out in such a way that the reverse phase input voltage exceeds the normal phase input voltage. As a result, a reference voltage generating circuit is capable of providing a smooth ramp up voltage at power up or during any time the supply voltage is below the predetermined voltage.

Abstract: A voltage overshoot protection circuit includes an integration circuit configuration. The integration circuit configuration is included in the voltage overshoot protection circuit so as to integrate excess diverted current drawn from a bus. The voltage overshoot protection circuit is adapted to be electrically coupled to the bus.

Abstract: A device for controlling a current to a load by means of mirroring is described. Two transistor units are connected to a common reference point. By driving a current through one of the transistor units, a corresponding current is generated in the second transistor unit. A control unit, connected between the transistors can regulate a voltage difference between transistors. Accordingly, the size of the load attached is determined through mirroring with accuracy and minimal power loss.

Abstract: An internal voltage-down power supply circuit includes a voltage-down circuit, a comparator circuit (current mirror amplifier), and a current source control circuit. The comparator circuit (current mirror amplifier) includes a current source (NMOS). When an external power supply voltage is increased, the current source control circuit reduces a control voltage applied to the gate of the current source to reduce the current from the current source. When the temperature becomes lower, the current source control circuit reduces the control voltage applied to the gate of the current source to reduce the current from the current source. Therefore, the closed loop gain of the internal voltage-down power supply circuit can be suppressed from increasing, and unnecessary oscillation of the internal power supply voltage can be prevented even when the external power supply voltage is increased and the temperature during operation is low.

Abstract: A low drop-out regulator 16 includes an error amplifier 18 having a first input for receiving a reference voltage Vref, a second input, and an output, a pass element 22 having a control terminal coupled to the output of the error amplifier and a current path coupled between an input voltage Vin and an output terminal Vout, and a pair of resistors 24, 26 coupled in series between the output terminal Vout and ground. The second input of the error amplifier 18 coupled to a node B between the pair of resistors. The error amplifier provides an added pole/zero pair in the frequency response of the regulator.

Abstract: An autocalibrated voltage reference includes a continuous time reference and a switched calibration reference where continuous time reference is dynamically adjusted to match the switched reference such that the temperature drift and long term drift of the continuous time reference is matched to the low temperature drift of the switched reference and further resulting in improvement of the long term drift of the switched reference and of the entire system.

Abstract: A voltage regulator that has a first mode circuit having a gating device and an amplifier, the gating device with a first input for receiving a first voltage, a second input, and an output. The amplifier is configured to receive a reference voltage and the gating device output as the second input. The gating device is configured to receive an amplifier output at said second input and responsive thereto to couple the first voltage with the gating device output when the gating device output is within a voltage range. The voltage regulator also has a second mode circuit having a voltage divider with an output. The voltage divider is configured to received the first voltage and supply a second voltage to the voltage divider output. The invention also relates to an integrated circuit having a power bus line and at least two voltage regulator cells coupled to the power bus line.

Abstract: A voltage regulator with load pole stabilization is disclosed. An error amplifier has a non-inverting input receiving a reference voltage and an inverting input receiving a feedback voltage from the output of the voltage regulator. A gain stage has an input connected to the output of the error amplifier and an output connected to a pass transistor that provides current to a load. A variable impedance device such as a FET transistor configured as a variable resistor is connected between the input and output of the gain stage to provide variable zero to cancel the varying pole when the output current drawn by the load fluctuates. Consequently, the disclosed voltage regulator has high stability without a significant increase in power dissipation.

Abstract: A current sharing apparatus for use in a power device system having a plurality of power devices disposed in parallel relationship. The power devices each include a programmable current source, a capacitive element coupled to the current source to generate a reference voltage, a power device configured to generate an output voltage following that of the reference voltage, and a slew rate controller. The controller has an input disposed in sensed communication with the output voltage to generate an error signal and control current from the current source. The current sharing apparatus includes a system output drawer connected to the respective power supply outputs to collect a total system output and a system output detector coupled to the system output drawer. The detector measures the total output through the drawer and is operative to generate a signal indicative of the total output and feed the signal to the respective slew rate controller inputs to further modify the error signals.

Abstract: A linear type of voltage regulator, having an input terminal adapted to receive a supply voltage thereon, and an output terminal adapted to deliver a regulated output voltage, includes a power transistor and a driving circuit therefor. The driving circuit includes an operational amplifier having a differential input stage biased by a bias current which varies proportionally with the output current of the regulator.

Abstract: A voltage rectifying and smoothing circuit for use in a regulated power supply circuit which converts an ac voltage to a constant dc voltage. A voltage control circuit, which prevents the production of a voltage higher than a predetermined voltage, is connected to a rectifier circuit which rectifies an input ac current to convert it to a rectified voltage. The voltage smoothing circuit is connected on the output side of the voltage control circuit.

Abstract: An low dropout voltage regulator (LDO) drive reduction circuit detects when the LDO's output voltage is going out of regulation due to a falling input voltage while the output is lightly loaded, and reduces the drive to the pass transistor in response. This action prevents the LDO's ground current from rising unnecessarily. The drive reduction circuitry directly monitors the voltage across the pass transistor; when above a predetermined threshold voltage which is typically well-below the LDO's specified dropout voltage, the pass transistor drive is permitted to vary as necessary to maintain a specified output voltage. If the monitored voltage falls below the threshold voltage, indicating that the input voltage is falling and the output is lightly loaded, the drive reduction circuit reduces the drive current, which would otherwise get increased in an attempt to restore the output voltage.

Abstract: A trimmable voltage regulator feedback network is arranged as a voltage divider: series-connected resistors are connected between the divider tap and the regulator's output voltage and a fixed resistance is connected between the tap and ground. Severable links are connected across at least two resistors above the tap to allow the regulator output voltage to be trimmed in linearly independent increments with each severed link, thereby simplifying the task of determining which links to sever to attain a desired output voltage. A trimmable resistance is inserted between the divider tap and the circuit being driven to enable the impedance of the network to be adjusted. A regulator including the novel feedback network can provide a temperature-compensated output over the full range of selectable output voltages.

Abstract: A regulator includes a driver stage having an output port for providing an output voltage, a predriver coupled to the driver to control the output voltage provided by the driver stage, a comparator to compare the driver output voltage to a reference voltage, and a feedback element coupled between the driver output port and the comparator. The driver may include a high side transistor having a collector coupled to a collector of a low side transistor, and a current sensing transistor having a base coupled to a base of the low side transistor.

Abstract: A voltage regulator and method of voltage regulation utilizes an error amplifier and a transconductance amplifier together with a voltage reference, startup circuit and output load. The use of the transconductance amplifier allows the use of an arrangement of two poles and a zero such that the composite gain roll-off has a generally constant slope. One of the poles utilized in this stability scheme is the outer pole formed by the resistive-like load and its filter capacitor. Another pole and zero are generated in the error amplifier circuit. To decouple the noisy input supply voltage, sensitive parts of the circuit are powered by the regulated output voltage. A start circuit is provided to start up the output and voltage reference when no output voltage is present. The transconductance amplifier block has special characteristics which allow it to work to relatively high frequency, above the gain bandwidth product of the control loop. It is driven by a fully differential push-pull, class AB amplifier.

Abstract: A voltage divider circuit comprises first and second transistor pairs 1 and 2 connected in series between a first standard voltage terminal VD and a second standard voltage terminal VS, and feedback control circuit 3. Each of transistor pairs comprises two NMOS transistors with the same electric characteristics, respectively. A divided ratio is set by a voltage applied to the gate terminals of these NMOS transistors M1-M4. Feedback-control circuit 3 comprises a load transistor pair 4 and an operational amplifier OP1. The circuit 3 performs feedback-control so that a voltage of connection lines L1 and L2 which connects first and second pairs of transistors becomes equal. Therefore, a high accurate divided voltage is outputted from between pairs 1 and 2 of transistors.

Abstract: A voltage regulator circuit includes: an output transistor MP.sub.X coupled between a voltage supply node V.sub.CC and an output node V.sub.OUT ; an amplifier A.sub.1 coupled to the output transistor MP.sub.X for controlling the response of the output transistor MP.sub.X ; feedback circuitry R.sub.1 and R.sub.2 connected between the output node V.sub.OUT and the amplifier A.sub.1, the feedback circuitry R.sub.1 and R.sub.2 providing feedback to the amplifier A.sub.1 ; and a pull-down circuit PD.sub.1 coupled to the output node V.sub.OUT.

Abstract: A voltage regulator circuit (10) is provided. Regulator circuit (10) includes an amplifier (18) with an emitter follower output stage (26). Emitter follower stage (26) is coupled to a gate of a PMOS transistor (28). The source of transistor (28) is coupled to an input voltage at a power supply rail (12). Regulator (10) provides an output at node (14) at a drain of transistor (28). The output at node (14) is divided by resistors (30 and 34) and provided in a negative feedback loop to an input of amplifier (18). A reference voltage (22) is also provided to a second input of amplifier (18) such that the output at node (14) is a regulated voltage.

Abstract: A voltage reference generator includes a voltage source and a differential amplifier. The voltage source supplies a stable voltage reference to a positive input of the differential amplifier which is configured as a follower having its output looped back to its negative input. The negative feedback loop is a variable-resistance loop that is controlled by the output of the differential amplifier. The variable-resistance feedback loop transiently imposes open-loop operation when the voltage reference generator is turned on so as to provide high current to the output before imposing closed-loop operation in follower mode.

Abstract: A voltage regulator with load pole stabilization is disclosed. The voltage regulator consists of an error amplifier, an integrator which includes a switched capacitor, a pass transistor, and a feedback circuit. In one embodiment, the integrator circuit includes an amplifier, a capacitor, and a switched capacitor which is driven by a voltage controlled oscillator. The voltage controlled oscillator changes its frequency of oscillation proportional to the output current. In another embodiment, the switched capacitor is driven by a current controlled oscillator whose frequency of oscillation is also proportional to the output current of the voltage regulator. When the output current demand is large, the controlled oscillators increase the frequency which decreases the effective resistance of the switched capacitor thereby changing the frequency of the zero to respond to the change in the load pole.

Abstract: A voltage regulator with load pole stabilization is disclosed. An error amplifier has a non-inverting input receiving a reference voltage and an inverting input receiving a feedback voltage from the output of the voltage regulator. A gain stage has an input connected to the output of the error amplifier and an output connected to a pass transistor that provides current to a load. A variable impedance device such as a FET transistor configured as a variable resistor is connected between the input and output of the gain stage to provide variable zero to cancel the varying pole when the output current drawn by the load fluctuates. Consequently, the disclosed voltage regulator has high stability without a significant increase in power dissipation.

Abstract: The fast transient load corrector is a circuit that attaches to the output terminals of a switching converter. Requiring no feedback circuit that interacts with any control parameter of the switching regulator, the fast transient load corrector works independently to improve the transient response of any switching regulator. Effectively the fast transient load corrector combines with the actual load to form a slowly varying composite load which permits the switching converter to maintain a well regulated output voltage or a voltage of pre-defined waveform. The conceptual construction consists of a bi-directional controlled current source and either a voltage sensor or a current sensor. The voltage or current sensor measures the amount of load disturbance and triggers the bi-directional controlled current source to supply transient current to the load. The quantity to be sensed can be the output voltage, the rate of change of the output voltage, or the rate of change of the output current.

Abstract: Operational transconductance amplifiers (OTAs) are combined at their outputs, yielding a single frequency compensation connection point. In a preferred embodiment, the output of each OTA is asymmetric, i.e., they can only source current and the OTA outputs are tied together to a constant current sink. Consequently, the OTA that sources more current controls the voltage of the merged output. This merged output point provides a voltage output that may be used as a frequency compensation point.

Abstract: A switched-mode voltage regulator includes a control unit receiving a direct voltage to be regulated and having an output at which an output voltage can be picked up. A voltage regulator amplifier receives the output voltage and a reference voltage and supplies an output signal. A multiplier unit multiplies the output signal of the voltage regulator amplifier with a signal obtained from the direct voltage to be regulated and supplies an output signal. A current regulator amplifier receives the output signal of the multiplier and a signal obtained from the direct voltage to be regulated. A driver stage converts the output signal of the current regulator amplifier into a trigger signal for the control unit. A circuit configuration for limiting the output voltage of the switched-mode voltage regulator includes an overvoltage amplifier generating an output signal as a function of the output voltage of the control unit.

Abstract: A power supply damping circuit (22) coupled across the leads of a power supply (20) is able to substantially damp or reduce the resonant response of the power supply and any associated noise, ringing, or oscillation produced by the power supply. The power supply damping circuit (22) provides a low value real impedance in parallel with the power supply (20) as a means of damping the power supply resonance circuit. The power supply damping circuit (22) includes a transconductance element (36) capacitively coupled across a power supply (20). A bias control (54) provides a bias current to the transconductance element (36) to set the static current of the transconductance element (36).

Abstract: A reconfigurable integrated circuit chip includes an output terminal (42) which is connected to the output of an inverting amplifier (44). The integrated circuit chip (10) includes an output terminal (46) which is connected to one input of a comparator (22). The other end of comparator (22) is connected to an internal voltage reference device (48). The output of comparator (22) is connected to the input of the inverting amplifier (44). The integrated circuit chip (10) may be configured as a linear regulator when a transconductance device (14) is connected between a DC power supply (12) and a load and an integrator (24) is connected between terminal (42) and the control input of the transconductance device (14). The integrated circuit chip (10) is configured as a switching regulator when a gated switch (14) is connected between a DC power supply (12) and a switching node (65) wherein the gated switch (14) is gated by the signal output by the output terminal (42).

Abstract: A method of designing improved CMOS input circuits by understanding and selecting appropriate drive strength for a CMOS output from a previous stage. The method involves modeling the net using HSPICE and including a transit time term to accurately model charge storage, then size drivers as needed to keep the V.sub.ss clamps out of forward conduction. Excessive ringing can cause data errors in the input stage if unterminated, falling edge transitions in such a net can turn on a receiver's V.sub.ss clamp diode (stored charge in the V.sub.ss clamp diode combined with the line's inductance and the receiver's capacitance form an energized resonant circuit which can release energy at a time to cause a data glitch). Currently, XNS simulation miscalculates the ring amplitude by a factor of three. Driver scaling and termination can eliminate the problem by keeping the receiver's V.sub.ss clamp out of forward conduction. Driver sizing can control the problem.

Abstract: A control circuit for, and method of, alternately controlling one of at least two controllable characteristics of a controlled circuit.

Abstract: The invention relates to a method to reduce the power consumption of an electronic device comprising at least one voltage regulator. At least one of the regulators (REG1-REG4) is switched off and on according to a predetermined duty cycle during such periods when the electronic device does not require the normal power supply ability of the regulator. This may be realized e.g. in a mobile phone during two successive control channel messages received from a base station when the mobile phone is in a so called power saving mode.

Abstract: A telecommunication terminal has a voltage controller (8) which controller forms at least part of an integrated circuit (1) and includes a differential amplifier (14) having a first input (+) for receiving a reference voltage (UREF), means (16, 20) for applying a load current (22) that is provided with at least one phase shifting component (23) as a function of an output voltage of the differential amplifier (14), and a feedback path for feeding back a voltage drop at the load (22) to the second (-) of the two inputs of the differential amplifier. To provide a maximum suppression of disturbances of the output voltage over a wide frequency range and guarantee the stability of the voltage controller, the phase shifting component (23) is arranged outside the integrated circuit (1) and a plurality of separate pins (4, 5) of the integrated circuit (1) are provided for coupling the phase shifting component (23) to the output of the means (16, 20) for producing a load current and to the feedback path.

Abstract: An electric power supply apparatus comprises a traveling-wave tube 15 exhibiting partial negative-resistance characteristics and a voltage stabilizing circuit for controlling a voltage control element 12 using an error amplifier 16 and a switch and for supplying stable power to the traveling-wave tube 15. In the apparatus, whether a traveling-wave tube 15 is in positive-resistance operation or negative-resistance operation is detected. In the negative-resistance operation, the control using the error amplifier 16 and the switch S1 is rendered ineffective.

Abstract: A voltage regulator, providing a constant-voltage output through an output terminal, includes an operational amplifier and an output stage driven by an output of the amplifier. A voltage reference is applied to a negative input terminal of the amplifier, and an input voltage, which is greater in magnitude than the output voltage, is applied to the output stage. A first feedback loop returns a signal proportional to the output voltage to the positive input of the amplifier. A second feedback loop extends between the output and input of the amplifier, including resistive and capacitative elements to stabilize the voltage regulator. In a version producing a positive output, the voltage reference applies a positive voltage to the amplifier, and the output stage includes a p-channel power MOSFET device. In a version producing a negative output, the voltage reference applies a negative voltage to the amplifier, and the output stage includes an n-channel power MOSFET device.

Abstract: A single-loop voltage regulator controller includes a high-gain transconductance amplifier that accommodates common mode inputs as low as its negative supply rail. The input stage of the amplifier produces a proportional to absoulte temperature (PTAT) input offset voltage. The transconductance amplifier's inverting input is connected to the circuit common, or negative supply rail, and a tap from a feedback network is connected to the amplifier's noninverting input. The feedback network provides, at this tap, a PTAT measure of the regulator's regulated output. The amplifier's output is connected to drive a noninverting driver which, in turn, is connected to drive the control terminal of the regulator's pass transistor. A compensation capacitor connected between the amplifier's output and the regulated output terminal ensures the regulator's stability even for relatively low level load impedances.

Abstract: A method of improving the performance of an active semiconductor device with a voltage-controllable channel length, comprises providing a matched reference component having similar operating characteristics to the active semiconductor device, continually monitoring the breakdown voltage of the matched reference component, and maintaining the operating voltage of the active semiconductor device to lie just below the measured breakdown voltage of the matched reference component. In this way, the performance of the active component can be optimized.

Abstract: This invention discloses an active electrical current filter including an N-channel FET controller coupled in series along a positive electrical line between an electrical power input and an electrical power output having voltages within a given range, apparatus for providing a driving voltage to the FET controller, the driving voltage being in excess of the voltages within said given range, and a differential voltage sensor, which senses the difference between the voltages at the filter input and output and whose output governs the driving voltage supplied to the FET controller, the active electrical filter exhibiting a voltage drop of less than one volt.

Abstract: An alarm based upon the voltage across a linear regulator's pass transistor and the regulator's load current alerts operational circuitry which obtains power through the regulator when the voltage across the pass transistor may be insufficient for proper voltage regulation. The alarm's trigger voltage is adjusted in response to variations in the regulator's output current.

Abstract: An uninterruptible power supply, with passing neutral, comprises a twin step-up chopper whose input is connected to a battery and to a rectifier circuit connected to the mains power system. The twin step-up chopper comprises a positive step-up chopper supplying a first output voltage between a positive DC output and neutral, and a negative step-up chopper supplying a second output voltage between a negative DC output and neutral. The control circuit of the twin step-up chopper comprises means for regulating imbalance between the output voltages of the positive and negative step-up choppers, suitable both for operation on the mains power system and for operation on the battery.

Abstract: A circuit configuration for generating a controlled output voltage from an uncontrolled input voltage, includes an input terminal for supplying the uncontrolled input voltage, and an output terminal for pickup of the controlled output voltage. A transistor has a load current path being connected between the input terminal and the output terminal. A controlled-gain amplifier has an input terminal for receiving the controlled output voltage and has an output terminal. A capacitor couples the output terminal of the controlled-gain amplifier with a control terminal of the transistor. A current source for discharging the capacitor is controllable by the controlled-gain amplifier. A charge pump has an output terminal for an increased voltage being connected to the control terminal of the transistor, for supplying an output voltage being controllable by the controlled-gain amplifier.

Abstract: A voltage regulator with load pole stabilization is disclosed. The voltage regulator consists of an error amplifier, an integrator which includes a switched capacitor, a pass transistor, and a feed back circuit. In one embodiment, the integrator circuit includes an amplifier, a capacitor, and a switched capacitor which is driven by a voltage controlled oscillator. The voltage controlled oscillator changes its frequency of oscillation proportional to the output current. In another embodiment, the switched capacitor is driven by a current controlled oscillator whose frequency of oscillation is also proportional to the output current of the voltage regulator. When the output current demand is large, the controlled oscillators increase the frequency which decreases the effective resistance of the switched capacitor thereby changing the frequency of the zero to respond to the change in the load pole.

Abstract: A voltage regulator with load pole stabilization is disclosed. The voltage regulator consists of an output stage, a comparator stage, and an active load. The active load draws current from the output of the voltage regulator inversely proportional to the current demand on the voltage regulator. When the output current demand is low, the active load draws relatively low current. When the output current demand is large, the active load draws a relatively large amount of current. Consequently, the disclosed voltage regulator has high stability without consuming excess power.

Abstract: The voltage regulator circuit contains a MOS transistor 12 connected between a voltage supply line 22 and an output line 30. The MOS transistor 12 provides a stable voltage on the output line 30 independent of voltage transients on the voltage supply line 22 and independent of current transients on the output line 30. An amplifier 14 coupled to the MOS transistor 12 controls the response of the MOS transistor 12. Feedback circuitry connected between the output line 30 and the amplifier 14 provides feedback to the amplifier 14. A voltage source 16 provides the reference for amplifier 14.

Abstract: A circuit arrangement for automatically decreasing the load current includes a series arrangement formed by a load and a first electronic switching device and connected to a DC source of power. The first switching device is driven by a driver. The circuit further includes a control circuit controlling the driver. The control circuit is adapted to be initiated by a second electronic switching device, so that the second electronic switching device connects the first terminal of a capacitor and of a first resistor as well as the base of a transistor to one pole of the DC source of power, with the main current path of the transistor being between the input of the driver and the other pole of the DC source of power. The second terminal of the capacitor and of the first resistor is coupled to the other pole of the DC source, and the end of the first electronic switching device connected to the load is coupled to the second terminal of the capacitor through a feedback resistor.