Granted Patent B2

US 12,249,962 · App. 17/662,170 · Granted Mar 11, 2025

Inventors: Raik Fiedler (Dresden, DE); Marcus Pietzsch (Dresden, DE)

Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

H03F1/0222H03F3/26H03F1/0244H03F2200/78

Abstract

Claims (32)

1. Method for controlling a driver circuit, comprising:

operating an amplifier for providing an output signal based on a control signal;

operating a comparator for providing the control signal by comparing an input signal to a feedback signal, wherein the feedback signal is based on the output signal;

providing a first supply voltage to the comparator;

providing a second supply voltage to the amplifier;

wherein the second supply voltage is higher than the first supply voltage; and

wherein the first voltage supply stage is provided by a first charge pump stage and wherein the second voltage supply stage is provided by a second charge pump stage.

2. Driver circuit, comprising:

an amplifier configured to provide an output signal based on a control signal;

a comparator configured to provide the control signal by comparing an input signal to a feedback signal, wherein the feedback signal is based on the output signal of the amplifier;

wherein the comparator is connected to a first voltage supply stage configured for providing a first supply voltage to the comparator;

wherein the amplifier is connected to a second voltage supply stage configured for providing a second supply voltage to the amplifier;

wherein the second supply voltage is higher than the first supply voltage; and

wherein the first voltage supply stage comprises a first charge pump stage and wherein the second voltage supply stage comprises a second charge pump stage.

3. Driver circuit according to claim 2 , wherein the first voltage supply stage comprises a first voltage source and the second voltage supply stage comprises a second voltage source.

4. Driver circuit according to claim 2 , wherein an amplitude of the control signal is lower than an amplitude of the output signal.

5. Driver circuit according to claim 2 , wherein the amplifier comprises a push-pull stage.

6. Driver circuit according to claim 2 further comprising a feedback loop configured to acquire the feedback signal from the output signal 182 ;

wherein a ratio of an amplitude of the feedback signal and an amplitude of the output signal corresponds to an amplification factor of the driver circuit.

7. Driver circuit according to claim 2 ,

wherein the first supply voltage is smaller than the second supply voltage by a factor of at least 2, preferably by a factor of at least 5, more preferably by a factor of at least 10.

8. Driver circuit according to claim 2 , wherein the amplifier is configured for self-adjusting a maximum current conducted through a push-pull stage, wherein the self-adjusting of the maximum current is based on a load.

9. System, comprising:

a load;

a driver circuit according to claim 2 ;

wherein the system is configured to control the load based on the output signal of the driver circuit.

10. System according to claim 9 ,

wherein the system comprises an integrated circuit, and

wherein the integrated circuit comprises the driver circuit.

11. System according to claim 9 ,

wherein the load comprises a capacity and/or an inductance;

and wherein a resistance of the load is higher than 10 kOhm or 100 kOhm or 1 MOhm.

Assignments (1)

Continuity (2)

References Cited (26)