US5313661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and circuit arrangement for adjusting the volume in a mobile telephone
Assignee: Nokia Oyj
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Filing: 1990-01-31
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Granted: 1994-05-17
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Expires: 2010-01-31
Abstract
Abstract Method and circuit arrangement for adjusting the volume in a mobile telephone. The telephone comprises a transceiver unit and on the other hand a physically separate operating device. A dc voltage level (DC) corresponding to the desired volume is adjusted with a potentiometer (1) in the operating device and the level is converted with an A/D-converter (2) into a corresponding digital control signal. The control signal is read with a microprocessor (3) in the transceiver unit, which further through the hold circuit (4) controls the gain of the audio amplifier (7). A multiplexer (5) may be provided for controlling and selecting a suitable feedback resistor (6) for the amplifier. The A/D-converter can be located in the operating device or in the transceiver unit. When it is located in the transceiver unit the dc voltage level (DC) is transmitted to the transceiver unit, preferably superimposed on the AC-signal received from the microphone, which then is filtered off before the A/D-converter. The connection between the operating device and the transceiver unit may be realized with a cable or a wireless infrared or radio connection.
Inventors
- 👤 Kalevi Malmi
- 👤 Ari-Pekka Lajunen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/6016; H03; H03G; H03G1/00; H03G1/02; H04M19/00; H04M19/02; H04M19/04; H04M1/72; H04M1/724; H04M19/042
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
116 words
Method for user adjustment of the volume of a mobile telephone including a transceiver unit and a physically separated operating device, comprising the steps of: manually adjusting a dc voltage level of said telephone to provide a desired volume using circuit means in the operating device, said voltage level being variable in a preselected voltage range, supplying a control signal corresponding to the dc voltage level to a microprocessor, reading the control signal with the microprocessor, adjusting the volume in relation to the control signal by controlling the gain of an audio amplifier through a multiplexer connected to the microprocessor, said multiplexer selecting an impedance connected in series with an input impedance of said audio amplifier.
Claim 2
Dependent Claim
116 words
Method for user adjustment of the volume of a mobile telephone including a transceiver unit and a physically separated operating device, comprising the steps of: manually adjusting a dc voltage level of said telephone to provide a desired volume using circuit means in the operating device, said voltage level being variable in a preselected voltage range, supplying a control signal corresponding to the dc voltage level to a microprocessor, reading the control signal with the microprocessor, adjusting the volume in relation to the control signal by controlling the gain of an audio amplifier through a multiplexer connected to the microprocessor, said multiplexer selecting an impedance connected in series with an input impedance of said audio amplifier.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the dc voltage level is converted to the control signal in the A/D-converter.
Claim 4
Dependent Claim
19 words
A method according to claim 2, wherein the converting to the control signal is provided in the operating device.
Claim 5
Dependent Claim
19 words
A method according to claim 2, wherein the converting to the control signal is provided in the transceiver unit.
Claim 6
Dependent Claim
26 words
A method according to claim 3 or 4, wherein the dc voltage level or the control signal is transmitted to the transceiver unit through a cable.
Claim 7
Dependent Claim
27 words
A method according to claim 5, characterized in that the dc voltage level is transmitted on a same conductor together with an audio signal from a microphone.
Claim 8
Dependent Claim
51 words
A method according to claim 1, wherein a second microprocessor is also provided in the operating device in connection with an A/D-converter, the second microprocessor transmitting the controls signal to a data bus between said operating device and said transceiver unit, thus providing volume control in accordance with the control signal.
Claim 9
Dependent Claim
22 words
A method according to claim 3, wherein the control signal is transmitted to the transceiver unit via one of more data lines.
Claim 10
Dependent Claim
16 words
A method according to claim 8, wherein the transmission is provided as a wireless infrared connection.
Claim 11
Dependent Claim
16 words
A method according to claim 1 wherein the dc voltage level is selected with a potentiometer.
Claim 12
Dependent Claim
108 words
Circuit arrangement for user adjustment of the volume in a mobile telephone, comprising: a transceiver unit; a physically separated operating device having circuit means for creating a dc voltage level corresponding to a desired volume, an A/D-converter for converting the dc voltage level to a digital control signal, a microprocessor in the transceiver unit for controlling the gain of an audio amplifier, and a multiplexer associated with said amplifier and connected to the microprocessor, said multiplexer selecting an impedance in series with in input impedance of said audio amplifier, and being selectably variable in accordance with the control digital signal to control the gain of the audio amplifier.
Claim 13
Dependent Claim
108 words
Circuit arrangement for user adjustment of the volume in a mobile telephone, comprising: a transceiver unit; a physically separated operating device having circuit means for creating a dc voltage level corresponding to a desired volume, an A/D-converter for converting the dc voltage level to a digital control signal, a microprocessor in the transceiver unit for controlling the gain of an audio amplifier, and a multiplexer associated with said amplifier and connected to the microprocessor, said multiplexer selecting an impedance in series with in input impedance of said audio amplifier, and being selectably variable in accordance with the control digital signal to control the gain of the audio amplifier.
Claim 14
Dependent Claim
23 words
Circuit arrangement according to claim 11, wherein the circuit means of the circuit arrangement for creating the dc voltage level comprises a potentiometer.
Claim 15
Dependent Claim
108 words
Method for adjusting the volume in a mobile telephone comprising a transceiver unit and a physically separated operating device, characterized by the steps of adjusting a dc voltage level to correspond to a desired volume with circuit means in the operating device, supplying a control signal corresponding to the dc level to a microprocessor, reading the control signal with the microprocessor, adjusting the volume in accordance with the control signal, said control signal being generated by an A/D-converter in the operating device and sent to the transceiver unit through a cable and on the same conductor together with an audio signal from a microphone in said transceiver unit.
Claim 16
Dependent Claim
108 words
Method for adjusting the volume in a mobile telephone comprising a transceiver unit and a physically separated operating device, characterized by the steps of adjusting a dc voltage level to correspond to a desired volume with circuit means in the operating device, supplying a control signal corresponding to the dc level to a microprocessor, reading the control signal with the microprocessor, adjusting the volume in accordance with the control signal, said control signal being generated by an A/D-converter in the operating device and sent to the transceiver unit through a cable and on the same conductor together with an audio signal from a microphone in said transceiver unit.
Claim 17
Dependent Claim
15 words
A method according to claim 8, wherein the transmission is provided via a radio connection.
Claim 18
Dependent Claim
17 words
A method according to claim 1, wherein the dc voltage level is selected by a rotary switch.
Claim 19
Dependent Claim
19 words
Circuit arrangement according to claim 11, wherein the circuit means for creating the dc voltage comprises a rotary switch.
References Cited (Backward Citations)
US3024360A
Cited
US3233177A
Cited
US3386053A
Cited
US3873921A
Cited
US4113984A
Cited
US4192990A
Cited
DE2737466A1
Cited
US4270216A
Cited
US4317222A
Cited
US4547777A
Cited
EP0106408A2
Cited
US4495652A
Cited
US4528696A
Cited
FR2567701A1
Cited
US4790019A
Cited
US4661994A
Cited
US4715062A
Cited
GB2180723A
Cited
US4718080A
Cited
US4947454A
Cited
US4797949A
Cited
FR2608865A1
Cited
EP0286600A2
Cited
US4962545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |