1. Cleaning apparatus comprising a cleaning unit driven by an electric motor and a housing which has a battery chamber for accommodating at least one rechargeable battery, a connecting device having a mechanical mounting part and an electrical plug connector part being disposed in the battery chamber for establishing an electrical and mechanical connection between the battery and the cleaning apparatus, wherein the mounting part is detachably mounted in the battery chamber, and the plug connector part is detachably connectable as desired to the mounting part or to a chamber wall of the battery chamber.
2. Cleaning apparatus according to claim 1, wherein the chamber wall has a plug connector receptacle for inserting the plug connector part.
3. Cleaning apparatus according to claim 2, wherein guide elements which interact with one another are disposed on the plug connector receptacle and on the plug connector part.
4. Cleaning apparatus according to claim 3, wherein the guide elements comprise guide ribs and guide grooves which receive said guide ribs.
5. Cleaning apparatus according to claim 1, wherein a guide groove is in each case disposed on the plug connector part on sides which face away from each other, with a guide rib which is provided on the chamber wall entering said guide groove.
6. Cleaning apparatus according to claim 2, wherein the mounting part is detachably connectable to the chamber wall, said mounting part covering the plug connector receptacle.
7. Cleaning apparatus according to claim 1, wherein the mounting part has an accommodation compartment for accommodating the plug connector part.
8. Cleaning apparatus according to claim 7, wherein guide elements which interact with one another are disposed on the accommodation compartment and on the plug connector part.
9. Cleaning apparatus according to claim 8, wherein the guide elements comprise guide ribs and guide grooves which receive said guide ribs.
10. Cleaning apparatus according to claim 1, wherein a guide groove is in each case provided on the plug connector part on sides which face away from each other, and a guide rib which is provided on the mounting part enters said guide groove.
11. Cleaning apparatus according to claim 1, wherein the mounting part comprises at least one positively locking element for establishing a positively locking connection to a battery.
12. Cleaning apparatus according to claim 11, wherein the at least one positively locking element is configured as a guide rail.
13. Cleaning apparatus according to claim 11, wherein the mounting part has two positively locking elements which are spaced apart from one another and between which the plug connector part is positionable.
14. Cleaning apparatus according to claim 13, wherein the two positively locking elements are fixedly connected to one another by means of a connecting wall of the mounting part and, together with the connecting wall, delimit an accommodation compartment for accommodating the plug connector part.
15. Cleaning apparatus according to claim 14, wherein the connecting wall has an opening which receives a projection of the plug connector part.
16. Cleaning apparatus according to claim 11, wherein the at least one positively locking element is disposed on an end face of the mounting part, which end face faces the interior of the battery chamber when the mounting part is inserted into the battery chamber.
17. Cleaning apparatus according to claim 16, wherein the end face of the mounting part forms a contact surface for contact by a battery above the at least one positively locking element.
18. Cleaning apparatus according to claim 1, wherein the chamber wall is configured as a pivotable flap which closes an access opening in the battery chamber.
19. Cleaning apparatus according to claim 1, wherein the battery chamber can be fitted with at least two rechargeable batteries, it being possible to alternately operate the cleaning apparatus with one of the batteries which are inserted into the battery chamber.
20. Cleaning apparatus according to claim 1, wherein the cleaning apparatus is configured as a suction apparatus comprising a cleaning unit in the form of a suction unit and comprising a dirt-collection container which has a suction inlet and is in flow connection with the suction unit.
21. Cleaning apparatus according to claim 1, wherein the housing comprises a housing lower part and a housing upper part which can be placed onto said housing lower part, the cleaning unit and the battery chamber being disposed in the housing upper part.
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 circuit for amplifying an input signal, comprising:
a power amplifier that receives the input signal and produces an output signal;
an amplitude detector coupled to an output of the power amplifier that produces a first measurement that corresponds to the amplitude of the output signal;
a power source for providing power to the power amplifier;
a current detector that produces a second measurement that corresponds to the current flowing into the power amplifier from the power source;
an adder for adding the first measurement with the second measurement to produce a third measurement; and
a control circuit connected to a biasing pin of the power amplifier for comparing the third measurement to a reference and for controlling the output power of the power amplifier based on the comparison.
2. The circuit of claim 1, wherein the amplitude detector comprises an envelope detector.
3. The circuit of claim 2, wherein the envelope detector comprises a diode and a resistor connected in parallel with a capacitor, wherein the diode is connected in series with the resistor and the capacitor.
4. The circuit of claim 3, wherein the amplitude detector further comprises a voltage to current generator that receives an output voltage from the envelope detector and converts the output voltage to a current.
5. The circuit of claim 4, wherein the voltage to current generator comprises a transistor.
6. The circuit of claim 1, wherein the current detector comprises a first resistor and the adder comprises a second resistor, wherein the resistance of the second resistor is larger than the resistance of the first resistor.
7. A mobile communication device comprising a circuit according to claim 1.
8. A circuit for amplifying an input signal, comprising:
a power amplifier that receives the input signal and produces an output signal;
an amplitude detector means, coupled to an output of the power amplifier, for producing a first measurement that corresponds to the amplitude of the output signal;
a means for providing power to the power amplifier;
a current detector means for producing a second measurement that corresponds to a current flowing into the power amplifier from the power providing means;
an adding means for adding the first measurement with the second measurement to produce a third measurement; and
a control circuit means, connected to a biasing pin of the power amplifier, for comparing the third measurement to a reference and for controlling the output power of the power amplifier based on the comparison.
9. The circuit of claim 8 wherein the amplitude detector means comprises an envelope detector.
10. The circuit of claim 9, wherein the envelope detector comprises a diode and a resistor connected in parallel with a capacitor, wherein the diode is connected in series with the resistor and the capacitor.
11. The circuit of claim 10, wherein the amplitude detector means further comprises a voltage to current generator means for receiving an output voltage from the envelope detector and converting the output voltage to a current.
12. The circuit of claim 11, wherein the voltage to current generator means comprises a transistor.
13. The circuit of claim 8, wherein the current detector means comprises a first resistor and the adding means comprises a second resistor, wherein the resistance of the second resistor is larger than the resistance of the first resistor.
14. A mobile communication device comprising a circuit according to claim 8.
15. A method, comprising the steps of:
producing a first measurement corresponding to the amount of current flowing into a power amplifier from a power source;
producing a second measurement corresponding to the amplitude of an output signal produced by the power amplifier;
adding the first measurement to the second measurement to produce a sum;
comparing the sum to a reference;
controlling the power amplifier based on a result of the comparison.
16. The method of claim 15, wherein the step of controlling the power amplifier comprises the step of applying a voltage to a biasing pin of the power amplifier.
17. The method of claim 16, wherein the magnitude of the voltage is a function of the difference between the sum and the reference.