1. Broadband driver circuit for driving voice and data signals, having a current dividing circuit, which divides a current generated by a current source, in a manner dependent on a voice and data signal present at a signal input, into two base currents for driving a first driver transistor and a second driver transistor, the two driver transistors being constructed identically, and the current dividing circuit having an NPN bipolar transistor or an NMOS transistor, whose base connection or gate connection is connected to an output of the control amplifier, whose collector or drain connection is connected to the cascode transistor and whose emitter or source connection is connected to the base connection of the first driver transistor.
2. Broadband driver circuit according to claim 1, wherein the two driver transistors have a high dielectric strength.
3. Broadband driver circuit according to claim 1, wherein the two driver transistors have a low transition frequency.
4. Broadband driver circuit according to claim 1, wherein the two driver transistors are NPN bipolar transistors.
5. Broadband driver circuit according to claim 1, wherein the quiescent current of the current source is adjustable.
6. Broadband driver circuit according to claim 1, wherein the current dividing circuit has a cascode transistor connected to the current source.
7. Broadband driver circuit according to claim 1, wherein the signal input is connected to a control amplifier.
8. Broadband driver circuit according to claim 1, wherein the cascode transistor has a base connection, at which a fixed voltage is present, and a second connection, which is connected to the current source, and also a third connection, which is connected to the base connection of the second driver transistor.
9. Broadband driver circuit according to claim 1, wherein the base connection and the emitter connection of the two driver transistors are in each case connected via a resistor.
10. Broadband driver circuit according to claim 1, wherein the two driver transistors are in each case connected to a current measuring transistor.
11. Broadband driver circuit according to claim 1, wherein provision is made of a quiescent current control circuit for controlling the quiescent current of the current source.
12. Broadband driver circuit according to claim 1, wherein the cascode transistor is a PNP bipolar transistor.
13. Broadband driver circuit according to claim 1, wherein the cascode transistor is a PMOSFET.
14. Broadband driver circuit according to claim 1, wherein the two driver transistors are Darlington transistors.
15. Broadband driver circuit according to claim 1, wherein the broadband driver circuit drives voice and data signals in a frequency band range from 0 to 1.1 MHz.
16. Broadband driver circuit according to claim 1, wherein the emitter connection of the first driver transistor and the collector connection of the second driver transistor are connected to a signal output of the broadband driver circuit.
17. Broadband driver circuit according to claim 1, wherein the two driver transistors can be operated with a supply voltage of about 0 to 80 V.
18. Broadband driver circuit according to claim 1, wherein the signal input of the broadband driver circuit is connected to a further control amplifier.
19. Broadband driver circuit according to claim 1, wherein the signal output is connected via a resistor to a terminal connection line for the connection of a terminal.
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. An ice-making device comprising:
a duct through which ice is dispensed;
a duct-covering part configured to open and close the duct;
a sensor part configured to sense whether the duct-covering part is positioned to close the duct; and
a control part configured to control the duct-covering part to open the duct when the sensor part senses that the duct-covering part fails to close the duct and the duct-covering part has been attempting to close the duct for at least a preset period of time,
wherein the sensor part comprises:
a magnet coupled to one of a side of the duct and a side of the duct-covering part; and
a hall sensor that is coupled to the other of the side of the duct and the side of the duct-covering part and that is configured to sense a magnetic field of the magnet.
2. The ice-making device according to claim 1, wherein
the magnet and the hall sensor are positioned such that, when the duct-covering part is positioned to close the duct, the magnet and the hall sensor contact and, when the duct-covering part is positioned to open the duct, the magnet and the hall sensor fail to contact.
3. The ice-making device according to claim 1, wherein the duct-covering part comprises:
a duct cap; and
a cap motor configured to rotate the duct cap to open and close the duct.
4. The ice-making device according to claim 3, wherein the control part is configured to rotate the cap motor in a first direction to cause the cap motor to rotate the duct cap to open the duct and rotate the cap motor in a second direction to cause the cap motor to rotate the duct cap to close the duct, the second direction being different than the first direction.
5. An ice-making device comprising:
a duct through which ice is dispensed;
a duct-covering part configured to open and close the duct;
a sensor part configured to sense a position of the duct-covering part relative to the duct; and
a control part configured to control the duct-covering part to repeat at least once an operation of opening and closing the duct when the sensor part senses that the duct-covering part fails to reach a closing position in which the duct-covering part closes the duct and the duct-covering part has been attempting to close the duct for at least a preset period of time,
wherein the sensor part comprises:
a magnet coupled to one of a side of the duct and a side of the duct-covering part; and
a hall sensor that is coupled to the other of the duct and the side of the duct-covering part and that is configured to sense a magnetic field of the magnet, the magnet and the hall sensor being positioned such that, when the duct-covering part is positioned to open the duct, the sensor part fails to sense.
6. The ice-making device according to claim 5, wherein the control part is configured to, after controlling the duct-covering part to repeat the operation of opening and closing the duct, reduce the preset period of time used in determining whether to repeat the operation of opening and closing the duct.
7. The ice-making device according to claim 6 wherein the control part is configured to gradually reduce the preset period of time used in determining whether to repeat the operation of opening and closing the duct each time the operation of opening and closing the duct is repeated.
8. The ice-making device according to claim 5, further comprising a warning part configured to output a warning to a user,
wherein the control part is configured to determine whether the operation of opening and closing the duct has been repeated a preset number of times and control the warning part to output the warning in response to a determination that the operation of opening and closing the duct has been repeated the preset number of times.
9. The ice-making device according to claim 5, wherein
the magnet and the hall sensor are positioned such that, when the duct-covering part is positioned to close the duct, the magnet and the hall sensor contact and, when the duct-covering part is positioned to open the duct, the magnet and the hall sensor fail to contact.
10. The ice-making device according to claim 5, wherein the duct-covering part comprises:
a duct cap; and
a cap motor configured to rotate the duct cap to open and close the duct.
11. The ice-making device according to claim 10, wherein the control part is configured to rotate the cap motor in a first direction to cause the cap motor to rotate the duct cap to open the duct and rotate the cap motor in a second direction to cause the cap motor to rotate the duct cap to close the duct, the second direction being different than the first direction.
12. The ice-making device according to claim 5, wherein
hall sensor is configured to sense whether the duct-covering part is in a position to close the duct based on whether the magnetic field of the magnet is relatively weak or relatively strong.
13. A method of controlling an ice-making device, comprising:
controlling, using a control part, a duct-covering part to open a duct to allow dispensing of ice;
subsequent to dispensing ice through the duct, controlling, using the control part, the duct-covering part to close the duct;
in response to controlling the duct-covering part to close the duct:
sensing, using a sensor part, whether the duct-covering part is in a position that closes the duct; and
determining, using the control part, whether a preset period of time has passed since controlling the duct-covering part to close the duct; and
in response to sensing that the duct-covering part is not in a position that closes the duct and determining that the preset period of time has passed since controlling the duct-covering part to close the duct, controlling, using the control part, the duct-covering part to reopen the duct
controlling, using the control part, the duct-covering part to repeatedly open the duct and attempt to close the duct until the sensor part senses that the duct-covering part is in a position that closes the duct;
determining, using the control part, whether, in attempting to close the duct, an operation to open and close the duct has been repeated a preset number of times; and
using the control part to stop controlling the duct-covering part to repeatedly open the duct and attempt to close the duct in response to a determination that an operation to open and close the duct has been repeated the preset number of times.
14. The method according to claim 13, further comprising, after controlling the duct-covering part to repeat an operation of opening and closing the duct, reducing the preset period of time used in determining whether to repeat the operation of opening and closing the duct.
15. The method according to claim 14 wherein reducing the preset period of time used in determining whether to repeat the operation of opening and closing the duct comprises gradually reducing the preset period of time used in determining whether to repeat the operation of opening and closing the duct each time the operation of opening and closing the duct is repeated.
16. The method according to claim 13, wherein:
the duct-covering part comprises a duct cap and a cap motor configured to rotate the duct cap to open and close the duct,
controlling the duct-covering part to open the duct to allow dispensing of ice comprises controlling, using the control part, the cap motor to rotate in a first direction to cause the cap motor to rotate the duct cap to open the duct, and
controlling the duct-covering part to close the duct comprises controlling, using the control part, the cap motor to rotate in a second direction to cause the cap motor to rotate the duct cap to close the duct, the second direction being different than the first direction.
17. The method according to claim 13, further comprising:
determining, using the control part, whether, in attempting to close the duct, an operation to open and close the duct has been repeated a preset number of times;
outputting, using a warning part, a warning to a user in response to a determination that an operation to open and close the duct has been repeated the preset number of times.
18. The method according to claim 13, wherein the sensor part comprises:
a magnet coupled to one of a side of the duct and a side of the duct-covering part; and
a hall sensor that is coupled to the other of the side of the duct and the side of the duct-covering part and that is configured to sense a magnetic field of the magnet.