Voltage regulation circuit for integrated circuits of chip- carrying cards

FIELD: voltage regulation circuits used in manufacture of chip-carrying card integrated circuits.

SUBSTANCE: proposed circuit has series regulator L with field-effect transistor M1. Series-connected between source lead placed at higher potential VDDext and gate lead M1 are capacitor C1 and second field-effect transistor that functions as transmitting gate TG1 controlled by power/reset signal POR. Applying external supply voltage VDDext with series-connected transmitting gate TG1 drives in conduction field-effect transistor M1 in compliance with charge of capacitor C1 that takes place in the process. As this charge takes certain time, overshoot of internal voltage VDDint can be avoided.

EFFECT: reduced degree of overshoot when driving transistor in conduction.

3 cl, 5 dwg

 

The present invention relates to the control scheme of the voltage applied in the design of integrated circuits (IC) chip-cards.

Integrated circuits with different areas of the stresses (external and internal stresses) usually contain diagrams of voltage regulation, for example, as described on page 10 of document LP2954/LP2954A “voltage Regulators with a low drop-out of synchronism for adjustable microprocessor 5 In the June 1999 National Semiconductor Corporation. Operating voltage for the integrated circuit is a potential difference between the output ground (VSS) and the supply potential. This voltage, hereinafter called the internal supply voltage VDDint,produced through a comprehensive scheme of regulation of the voltage, which is formed by the serial controller. To simplify the explanation of the wiring diagram of the serial controller is shown in figure 1 in the famous diagram of voltage regulation, illustrating the principle of operation of the serial controller.

Shown in figure 1, the circuit includes a serial controller L, which contains the transistor serial controller and converts the external power supply voltage VDDextin the internal power supply voltage VDDint. At the conclusion of the transistor M1 serial is the slider as o R regulation of the serial controller applied electric potential, provided to control the voltage conversion. This signal is internal to the regulator analog signal. Internal VDDintprovided for the power supply voltage of the IC chip card. Internal capacity Ccoreshown to explain the operation of the scheme. Sequential controller is usually much more complex and not the same as shown in the drawing, a simplified example, but has the same principle of operation.

Shown in figure 1 diagram of the voltage regulation has the disadvantage that with the rapid inclusion of the external supply voltage VDDextthere overshoot (emissions) of the internal supply voltage VDDintthat, starting from a certain level of integration become invalid, as they cause damage to the thin oxide gate transistor associated with VDDint. Figure 4 shows the change characteristics VDDintand VDDextdepending on the time of the inclusion process.

In addition, for IP chip card specifies the number (five) of the pads, pins, usually called pads (VDDext, VSS, Clock (clock output), IO (input/output), Reset (reset)), and the sequence corresponding to the norm ISO/GSM. Therefore, there is no way by providing additionally the x pads or other sequence to implement the desired transient response.

The present invention is to offer a simple control scheme voltage for the IC chip cards, which does not manifest the problem of overshoot at turn-on.

This problem is solved by the circuit of voltage regulation with signs of paragraph 1 of the claims. Further embodiments of the invention are reflected in the dependent claims.

Corresponding to the invention the circuit of voltage regulation with a serial controller, known as such, and designed to generate the internal supply voltage VDDintand between the output of the external supply voltage VDDextand regulating the output of the sequential controller is in series connected capacitance and a field-effect transistor provided as a transmitting shutter. For this purpose, the transmitting shutter is provided an electric potential that is modified accordingly, the control signal of the IC chip card. The serial controller includes, in particular, the serial transistor regulator, which included its source and drain in series between the external supply voltage VDDextand the internal supply voltage VDDintand the output of the gate which is the regulatory output of the sequential controller or ENISA least connected with the regulatory output. Applied to the gate potential of the transistor serial regulator is adjustable.

In the drawings illustrating the invention, shows the following:

Figure 1 - the above diagram voltage regulator, known from the prior art;

Figure 2 - preferred option of the respective invention circuit voltage regulator;

Figure 3 - diagram of the signal power-on/reset (POR signal);

4 is a diagram VDDintand VDDextfor the circuit of figure 1;

5 is a diagram corresponding to the diagram in figure 4, for the circuit shown in figure 2.

Figure 2 shows the exemplary embodiment corresponding to the invention the circuit of the voltage regulator, which provides a serial controller L to explain the principle of operation of the circuit, as in figure 1. Options run the serial controller give relevant examples related to the invention of schemes that do not require special description. Between the source and gate of the transistor M1 serial controller, the period of the source-drain of which is used to convert the voltage, connected in series connected capacitor C1 and the transmitting gate TG1 formed by the field effect transistor. Other components of the scheme correspond to the usual pattern, for example, shown in figure 1.

p> The management of the transmission gate is carried out using a signal, which is produced provided for this generator SG signal as the signal power/reset and typically has a time dependence, presented in the chart in figure 3. This signal power/reset is a digital signal and has two values, namely, the ground potential or VSS and the external supply voltage VDDext. It is produced in the IC chip card regardless circuit provided in accordance with the invention, and is used for switching.

At the moment when the capacitor C1 is discharged. When the applied external voltage supply VDDexttransistor M1 serial controller is unlocked when sequentially connected to the transmitting gate in accordance with existing charge of the capacitor C1. As this charge requires a certain time, the serial controller L unlocked slowly. Corresponding to the invention of the circuit elements C1 and TG1, as essential to the invention, the components are provided regardless of the specific implementation of the serial controller. Preferably they are calculated with a time constant that is larger than the (internal) time constant of the voltage regulator. Thus temperature is raised, and (internal) capacity Ccorealso charged slowly, allowing you to avoid overshoot of the internal supply voltage VDDint. Therefore, in this scheme, the time dependence of voltage correspond to the curves presented in the chart in figure 5.

After the completion of the internal transition process transmits the shutter permanently locked signal POR. As additional capacitance C1 depends only on the external supply voltage VDDextand transmitting the shutter during operation remains permanently locked, the control voltage does not affect the dynamic mode of operation of the IC chip card. In addition, the process also is not affected by static and dynamic power consumption. Reduction of the resulting emission current provides the advantage consisting in reducing the migration of electrons.

1. The control scheme voltage for the integrated circuit (IC) chip cards containing the sequential controller (L) to generate the internal supply voltage (VDDintfrom the external supply voltage (VDDext), in which serial encoder (L) contains a transistor (M1) serial controller, which is its source and drain is placed in series between the external supply voltage (VDDextthe internal voltage is agenies power supply (VDD int), and regulating the output (R), provided to control the potential applied to the output gate of the transistor (M1) serial controller, characterized in that between the output of the external supply voltage (VDDext) and regulatory (R), switched capacitor (C1) and a field-effect transistor provided as a transmitting gate (TG1), referred to the transmitting gate (TG1), a varying electric potential during the transition process unlocks the transmitting circuit of the shutter, so is the charge of the capacitor (C1), and after the completion of the transition process, the transmitting gate permanently locked.

2. The scheme of the regulation voltage according to claim 1, in which the output of the transmitting gate (TG1) is associated with a part of the scheme, which generates a voltage signal, which in time takes two successive different values.

3. The scheme of the regulation voltage according to claim 2, in which two-level voltage signal is a signal power-up/reset, the corresponding control signal of the IC chip of the card.



 

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FIELD: voltage regulation circuits used in manufacture of chip-carrying card integrated circuits.

SUBSTANCE: proposed circuit has series regulator L with field-effect transistor M1. Series-connected between source lead placed at higher potential VDDext and gate lead M1 are capacitor C1 and second field-effect transistor that functions as transmitting gate TG1 controlled by power/reset signal POR. Applying external supply voltage VDDext with series-connected transmitting gate TG1 drives in conduction field-effect transistor M1 in compliance with charge of capacitor C1 that takes place in the process. As this charge takes certain time, overshoot of internal voltage VDDint can be avoided.

EFFECT: reduced degree of overshoot when driving transistor in conduction.

3 cl, 5 dwg

FIELD: electric engineering.

SUBSTANCE: support voltage source has first and second amplifiers 5, 6, two power sources 7, 8 of opposite polarity, first and second resistors 1, 2, connected serially and connected between common point 7, 8 and inverse input 5, connected to output 6, and serially connected third and fourth resistors 3, 4, which are connected to middle point of resistors 1, 2 and to output of amplifier 5, inverse amplifier input 6 is connected to middle point of resistors 3, 4, while non-inverse inputs of amplifier 5, 6 are connected by common point 7, 8. as first and fourth resistors a non-linear element is connected, having volt-ampere characteristics of voltage stabilizer. As resistor 2 or 3 non-linear element is connected, having volt-ampere characteristics of current stabilizer.

EFFECT: simplified construction.

2 cl, 4 dwg

FIELD: power units designed to ensure spark safety of loads.

SUBSTANCE: proposed device 200 designed to supply with power spark-proof load provided with feedback circuit of integrated current supply and current limiting component and also to minimize voltage that should be limited in compliance with sparking safety standards has power supply PS and output terminals T1-T2 for connecting device to spark-proof load. Voltage limiting unit Z1 inserted between power supply PS and output terminals T1-T2 is used to limit voltage across load leads. Current limiting unit 202 has barrier resistors designed for current-to-voltage conversion to provide for comparison by operational amplifier that controls variable impedance Q1 and limits current supply to load.

EFFECT: reduced manufacturing cost, improved sparking safety.

19 cl, 3 dwg

FIELD: electric engineering.

SUBSTANCE: for controlling constant voltage pulse stabilizer current value of stabilized voltage is measured, measured value is compared with constant support voltage, on basis of discordance signal by means of synchronization voltage of saw-like shape broad-pulse modulated signal is formed, used for controlling adjusting stabilizer element. Also, this signal is demodulated and received correction signal is added to discordance signal. When selecting correction signal transfer coefficient, static error value of voltage stabilization is corrected. It is possible to ensure equality of static error to zero by selecting transfer coefficient appropriately. Current control method is effective for different variants of direct voltage converters (of increasing, decreasing and inverting types) and different modes of their operation (as with continuous, as with discontinuous stabilizer throttle currents).

EFFECT: lesser static error of voltage stabilization in case of external interference (change of inlet voltage or load resistance, influence of non-ideal elements of stabilizer power circuit).

3 dwg

FIELD: electric engineering.

SUBSTANCE: device has compound adjusting element 1, force transistor 2, synchronization transistor 3, discordance signal amplifier 4, resistor 5, protective transistor 6. when main power fails, protective transistor opens to lift voltage from collector of transistor 3 and amplifier 4. this provides protection for transistor 3 from overload and increases reliability of stabilizer operation.

EFFECT: higher reliability, higher efficiency.

2 dwg

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