1. A laser drive circuit comprising:
a plurality of input channels configured to receive digital input channel signals;
at least one digital-to-analog converter, each input channel being assigned to at least one digital-to-analog converter, each digital-to-analog converter having a current input, a current output, and a digital data input, the digital-to-analog converter being configured to output an output current at the current output to amplify an input current at the current input by a current amplification as analog amplification, the digital-to-analog converter configured to convert a digital input value at the digital data input in the current amplification; and
a switching amplifier device, each input channel being connected to a switch input of the switching amplifier device,
wherein the current output of each digital-to-analog converter is connected to a current input of the switching amplifier device, and
wherein the switching amplifier device is configured to switch each output current of each digital-to-analog converter according to the input channel signal of the associated input channel, to sum it, and to output it amplified at least to one output of the switching amplifier device.
2. The laser drive circuit according to claim 1, further comprising at least one analog switch, wherein a current input of the at least one digital-to-analog converter is connected to the at least one analog switch.
3. The laser drive circuit according to claim 1, wherein a current output of at least one digital-to-analog converter is connectable to a current input of at least one additional digital-to-analog converter via a switch.
4. The laser drive circuit according to claim 2, wherein the current output of the at least one digital-to-analog converter is connectable to the current input of the additional digital-to-analog converter by the analog switch.
5. The laser drive circuit according to claim 2, wherein the at least one analog switch is connected to a first reference source to provide a first reference current andor to a second reference source to provide a second reference current, so that the first reference current or the second reference current is switchable to the analog input of the digital-to-analog converter by the analog switch.
6. The laser drive circuit according to claim 1, further comprising a master channel and a number of slave channels, in which one of the digital-to-analog converters is assigned to the master channel, wherein the current output of the digital-to-analog converter assigned to the master channel is connectable to the current inputs of the digital-to-analog converters assigned to the slave channels via a switch.
7. The laser drive circuit according to claim 1, further comprising a master channel and a number of slave channels, wherein each slave channel has a configurable logic, wherein the input channel signals of the slave channels are logically linkable by the configurable logic, particularly by an AND or OR or EXCLUSIVE operation, to the input signal of the master channel for switching by the switching amplifier device.
8. The laser drive circuit according to claim 1, wherein the switching amplifier device has a component for setting the amplification of the switching amplifier device, the component including switchable amplifier units connected parallel to one another.
9. The laser drive circuit according to claim 1, further comprising:
an oscillator whose output is connected to a switch input of the switching amplifier device to output a digital oscillator signal; and
an additional digital-to-analog converter, whose current output to output an additional output current is connected to a current input of the switching amplifier device,
wherein the switching amplifier device is formed to switch the additional output current in the oscillator signal clock, and also to sum it and to output it amplified at the at least one output.
10. The laser drive circuit according to claim 9, further comprising:
an additional analog switch, which is connected to an additional current input of the additional digital-to-analog converter and to the first reference source andor to the second reference source andor to one or more of the current outputs of the digital-to-analog converter.
11. The laser drive circuit according to claim 9, further comprising:
an additional configurable logic, whose output is connected to an input of the oscillator andor to the additional digital-to-analog converter,
wherein the additional configurable logic andor the oscillator is configured to change a gating of the oscillation of the oscillator andor an oscillator frequency of the oscillator andor an amplitude of the oscillator signal andor a phase of the oscillator signal by a logical linking of one or more input channel signals of the channels andor by control signals.
12. The laser drive circuit comprising digital-to-analog converters, each having a current input and a current output to set current values of partial currents that are switchable by digital channel signals, to provide a laser current pulse at least on the basis of a sum of the partial currents, wherein at least one current output of one of the digital-to-analog converters is connected to at least one current input of an additional digital-to-analog converter via an analog switch.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A power supply apparatus comprising:
a first capacitor that is connected to a power supply line which supplies power to a fuel injection system and that suppresses fluctuations in voltage of the power supply line;
DC loads except the fuel injection system; and
a second capacitor that is parallel-connected to the DC loads to exclusively supply the power to the DC loads.
2. The power supply apparatus according to claim 1, wherein the second capacitor is charged by first switch means for passing a current through the power supply line and the second capacitor, after a predetermined time has elapsed since an engine is started.
3. The power supply apparatus according to claim 1, wherein the second capacitor is charged by charging control means for controlling charging of the second capacitor when or after an engine is started.
4. The power supply apparatus according to claim 3, wherein the charging control means has power supply suppressing means for suppressing a power supply amount per unit time to the second capacitor.
5. The power supply apparatus according to claim 4, wherein the power supply suppressing means uses a resistance.
6. The power supply apparatus according to claim 4, wherein the power supply suppressing means has second switch means, and the second switch means repeats charging of the second capacitor intermittently, and thereby reduces an average of the power supply amount per unit time.
7. The power supply apparatus according to claim 1, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
8. The power supply apparatus according to claim 1, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
9. The power supply apparatus according to claim 2, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
10. The power supply apparatus according to claim 3, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
11. The power supply apparatus according to claim 4, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
12. The power supply apparatus according to claim 5, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
13. The power supply apparatus according to claim 6, further comprising:
first check means for preventing the power from being supplied from the first capacitor to the second capacitor and the DC loads.
14. The power supply apparatus according to claim 2, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
15. The power supply apparatus according to claim 3, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
16. The power supply apparatus according to claim 4, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
17. The power supply apparatus according to claim 5, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
18. The power supply apparatus according to claim 6, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
19. The power supply apparatus according to claim 7, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.
20. The power supply apparatus according to claim 9, further comprising:
second check means for preventing the power from being supplied from the second capacitor to the power supply line.