CA1298924C - Circuit that incorporates passive and active components - Google Patents
Circuit that incorporates passive and active componentsInfo
- Publication number
- CA1298924C CA1298924C CA000589607A CA589607A CA1298924C CA 1298924 C CA1298924 C CA 1298924C CA 000589607 A CA000589607 A CA 000589607A CA 589607 A CA589607 A CA 589607A CA 1298924 C CA1298924 C CA 1298924C
- Authority
- CA
- Canada
- Prior art keywords
- adjustable
- central store
- regulating value
- volatile
- stores
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 239000000543 intermediate Substances 0.000 claims abstract description 29
- 230000006870 function Effects 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims abstract description 4
- 239000000306 component Substances 0.000 description 18
- 239000003990 capacitor Substances 0.000 description 6
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
- H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/001—Digital control of analog signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/603—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of mechanical or electronic switches or control elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
- H04R25/609—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of circuitry
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Networks Using Active Elements (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters And Equalizers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Interface Circuits In Exchanges (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Semiconductor Lasers (AREA)
- Devices For Supply Of Signal Current (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
ABSTRACT
Circuit with adjustable amplifiers for microphones, receivers, loudspeakers, dial signal generators or the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems, drift-compensation systems, or the like, in use in telephone apparatuses or tele-phone systems or apparatuses that are connected to telephone lines or the like, with adjustable amplifiers and passive components that are digitally adjustable as a function of binary coded regulating value data words. All the regulating value inter-mediate stores are connected to associated storage locations of a non-volatile central store or are themselves configured as components of the non-volatile central store, within which the regulating value data words provided for the individual inter-mediate stores can be read in from an external data source by means of a serial data bus. All the adjustable amplifiers and resistances together with their associated intermediate stores with their power supply system that is powered through the speaking lines and either the central store itself or the connectors for an external central store with all the connecting lines and switching circuits are combined into a single component by inte-grated circuit technology.
Circuit with adjustable amplifiers for microphones, receivers, loudspeakers, dial signal generators or the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems, drift-compensation systems, or the like, in use in telephone apparatuses or tele-phone systems or apparatuses that are connected to telephone lines or the like, with adjustable amplifiers and passive components that are digitally adjustable as a function of binary coded regulating value data words. All the regulating value inter-mediate stores are connected to associated storage locations of a non-volatile central store or are themselves configured as components of the non-volatile central store, within which the regulating value data words provided for the individual inter-mediate stores can be read in from an external data source by means of a serial data bus. All the adjustable amplifiers and resistances together with their associated intermediate stores with their power supply system that is powered through the speaking lines and either the central store itself or the connectors for an external central store with all the connecting lines and switching circuits are combined into a single component by inte-grated circuit technology.
Description
1298g24 The present invention relates to a circuit with adjustable amplifiers for microphones, receivers,loudspeakers, dial signal generators, and the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems or drift-compensation systems, or the like, in use in telephone apparatuses and telephone systems or devices that are operated when connected to telephone lines or the like, with adjustable amplifiers and passive structural elements that can be adjusted digitally as a function of binary coded regulating value data words.
Systems of this kind are used not only in telephone subscriber substations or in telephone exchanges, but also in intercom systems, remote monitoring systems and, generally, in all systems in which acoustic signals are generated, received, transmitted, and relayed.
Thus, for example, in order to provide for optimal matching of the electrical operating values of a telephone subscriber substation to given or desired operating conditions, such as, for example, matchinq the terminating resistance to the particular line lengths or the setting of the desired receiver or alarm loudness, diverse regulating systems are provided, and each of these is adjustable per se.
However, regulating systems of a similar kind are known in conjunction with hearing aids, for example, from AT-PS 379.929 published March 10, 1986 and from DE-OS 3 642 828 laid open August 13, 1987, in which the amplifiers are~controlled from values that are stored in digital stores. In ~298924 both cases, remote-control devices are provided, and these act on the contents of the stores of the digital stores and thus affect the degree of amplification provided by the amplifiers.
In the course of fitting telephone apparatuses or devices thereof that are provided with microphones, receivers or the like, with electronic components, the question arises as to the elements in which conventional construction methods are to be retained and which elements can be combined into a single, integrated, universally adaptable element. When this is done, economy of implementation plays a role in addition to technical costs.
For this reason, the present invention undertakes to find an optimal solution in this regard, this being achieved in that the adjustable amplifiers and resistors are digitally adjustable as a function of binary coded regulating value data words, these data words being read into associated regulating value intermediate stores that are supplied with current from the speaking lines, either as volatile or non-volatile data, and in that all the regulating value intermediate stores are connected to associated storage locations of a non-volatile central store or else are themselves configured as components of the non-A volatile store into which the regulating value data words in provided for the individual intermediate stores can be read~r~m an external data source by means of a serial data bus; and in that all the adjustable amplifiers and resistors together with their associated intermediates stores with their power supply system that is supplied from the speaking lines and either the central store itself or the connectors for an external store and combined with all the connecting lines and switching systems into one component using integrated-circuit technology.
On the one hand, the present invention exploits the fact that apart from those components such as microphones, receivers, dial signal generators, and the like, which are not amenable to miniaturization because of potential manipulation problems, all the components are combined into one component using integrated-circuit technology. This results in a reduction in the number ofcomponents, which is important for efficient production. On the other hand, the use of inexpensive, volatile stores as intermediate stores, from which data is lost when there is no current, but which are written to once again from the central store prior to operation, results in a considerable reduction in the cost of the total system.
In accordance with the present invention there is provided circuit with adjustable amplifiers for microphones, recei~ers, loudspeakers, dial signal generators or the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems, drift-compensation systems, or the like, in use in telephone apparatuses or telephone systems or apparatuses that are connected to telephone lines or the like, with adjustable amplifiers and passive components that are dlgitally adjustable as a function of binary coded regulating value data words, wherein the regulating value data words can be read into associated regulating value intermediate stores that are powered through the speaking lines where they can be stored in ,,;
~298g24 4a 20365-2914 volatile or non-volatile form; and wherein all regulating value intermediate stores are connected to associated storage locations of a non-volatile central store or are themselves configured as components of the non-volatile central store, within which the regulating value data words provided for the individual intermediate stores can be read in from an external data source by means of a serial data bus; and wherein all the adjustable amplifiers and xesistances together with their associated intermediate stores with their power supply system that is powered through the speaking lines and either the central store itself or the connectors for an external central store with all the connecting lines and switching circuits are combined into a single component by integrated circuit technology.
The component parts of a telephone substation are shown in the drawing as an embodiment of the present invention; in this drawlng, those components that have been combined into a component by using integrated-circuit technology are set off from the other components by a dashed line.
The telephone subscriber substation shown in the drawing is connected to its associated connector set through its speaking wires 1, 2, the speaking line 2 also serving as the ground line.
The subscriber substation not only sends and receives speech information via the speaking lines, but it also draws supply .~`' ' ~.
~Z989Z4 current for all of its somponents through them. The voltage on line l is limited, to +18 V, for example, by a zener diode. A
hybrid circuit [four-wire terminating set] is numbered 4; on the one hand, this forms the line termination for the speaking lines l, 2 and, on the other, forms the output coupler for the incoming speech signals and the input coupler for the outgoing speech signals.
A balancing capacitor that forms part of an adjustable balancing circuit is numbered 5; with the help of a regulating device 6, this permits optimization of the line termination impedance which, as is known, is a function of line length. The regulating device 6, like all conventional regulating devices, is provided with an associated volatile or non-volatile regulating value intermediate store 6' that receives an impressed binary coded data word from a non-volatile central store 7 during operation of the system, or has stored a data word that represents the currently valid regulating value as a component of the non-volatile central store. In the case of the regulating device 6, this regulating value indicates a resistance value of an Ohmic resistance that is part of the hybrid circuit 4 (not shown in greater detail herein) which, in conjunction with the capacitor 5, forms the terminating impedance of the speaking lines l, 2.
The connections from the central store 7 to the individual re-gulating devices are indicated, on the one hand, by an arrow pointing out of the central store 7 and, on the other hand, by an arrow pointing to each individual regulating device. An additional capacitor 8 provides for balancing in order to optimise the voice traffic alternating current.
A voltage-power supply unit 9 is used to supply power to the components in the integrated circuit and to the components connected thereto; this unit 9 obtains its power through the speaking lines 1, 2 and has a dynamic characteristic that can be adapted to the regulations of various postal administrations (or other authorities) with regard to its power consumption. In order to do this, it is necessary to measure the current consump-tion, and this is done by means of a current-measuring resistance 10. The availability of temperature stabilized voltage is necessary for various systems within the integrated circuit, and this is supplied from a stabilizer 11. The regulating element 12 with its associated regulating element intermediate store 12' is used to regulate the dynamic characteristic that is required in each particular instance. A further regulating element 13 with an associated intermediate store 13' serves to regulate the line balancing network in the four-line terminating set 4, with the help of which the subscriber can adjust the level at which the level of his or her own speech is heard. If the power consumption of the apparatuses connected to the integrated com-ponent exceeds a preset threshold value, a signal generator 14 sends a warning signal. The threshold value needed to do this is provided from a regulating element with an associated intermediate store 15'.
Whereas up to now all the regulating elements used in conjunction with the power supply and the line matching have been mentioned, in the following, those regulating elements that are combined with adjustable amplifiers used for regulating the current of the microphone, receiver, and the dial system will be discussed. For all of these, a temperature compensation is pro-vided, for which a temperature compensation current is generated by means of a resistor 16 in conjunction with a regulating element 17 and an associated intermediate store 17', and this is passed to all of these amplifiers.
A speech signal that arrives through the speaking lines 1, 2 is passed from the four-line terminating set 4 along a line 18 to an amplifier 19, the amplification factor of which can be adjusted by means of a regulating element 20 with an associated intermediate store 20'. The output voltage of the amplifier 19 is inverted by a subsequent amplifier 21. Acoustic devices such as receiver capsules, microphones, etc., can be connected to the bridge amplifiers formed thereby.
The microphone provided for the outgoing voice traffic is numbered 23. A regulating element 24 with an associated inter-mediate store 24' is used to regulate the microphone current. A
switch 25 is also incorporated in the microphone circuit, and this is open during multi-frequency dialling. The microphone current is coupled into the integrated component through a capaci-tor 26 and from there it is passed to a microphone amplifier 27. This is provided with a regulating element 28 for regulating the amplification, and an intermediate store 28' is associated with this element 28. A potentiometer 29 with an additional regulating element 30 connected to its tap, and which has an associated intermediate store 30', is provided to regulate the frequency response of the microphone amplifier.
The output current of the microphone amplifier 27 passes through a reversing switch 31 and along a line 32 to the four-line terminating circuit 4, where the outgoing signal is coupled into the speaking lines 1, 2. An additional regulating element 33 with an associated intermediate store 33' which, together with an externally connected capacitor 34 forms a resistance-capacitance element, serves to further modify the outgoing signal.
Dialling signals are generated by means of a multi-frequency dialling signal generator 35. When the dialling signal generator 35 is activated, first the reversing switch 31 is moved from the position shown into its other position so that dialling signals transmitted through a capacitor 36 and amplified by a dialling signal amplifier 37 are passed in place of the microphone signals to the line 32 that leads to the four-line terminating set 4. The amplification factor of the dialling signal amplifier 37 can be adjusted by means of a regulating element 38, the associated intermediate store of which is numbered 38'. Thus the level of the dialling signals can be adjusted.
In the embodiment shown, either an EAROM (electrical alterable read only memory) or an EEROM (electrical erasable read only memory) serves as a central store. The store locations of the central store 7 associated with the individual intermediate stores have the appropriate data applied to them by means of a serial data bus 39, through an external device. A
logic circuit 40 that precedes the central store 7 is used for this. An answering line 41 provides external control of the data that is stored. However, it is also possible to configure the central store as an external device, the data of which is passed to the individual intermediate stores through suitable connections.
Systems of this kind are used not only in telephone subscriber substations or in telephone exchanges, but also in intercom systems, remote monitoring systems and, generally, in all systems in which acoustic signals are generated, received, transmitted, and relayed.
Thus, for example, in order to provide for optimal matching of the electrical operating values of a telephone subscriber substation to given or desired operating conditions, such as, for example, matchinq the terminating resistance to the particular line lengths or the setting of the desired receiver or alarm loudness, diverse regulating systems are provided, and each of these is adjustable per se.
However, regulating systems of a similar kind are known in conjunction with hearing aids, for example, from AT-PS 379.929 published March 10, 1986 and from DE-OS 3 642 828 laid open August 13, 1987, in which the amplifiers are~controlled from values that are stored in digital stores. In ~298924 both cases, remote-control devices are provided, and these act on the contents of the stores of the digital stores and thus affect the degree of amplification provided by the amplifiers.
In the course of fitting telephone apparatuses or devices thereof that are provided with microphones, receivers or the like, with electronic components, the question arises as to the elements in which conventional construction methods are to be retained and which elements can be combined into a single, integrated, universally adaptable element. When this is done, economy of implementation plays a role in addition to technical costs.
For this reason, the present invention undertakes to find an optimal solution in this regard, this being achieved in that the adjustable amplifiers and resistors are digitally adjustable as a function of binary coded regulating value data words, these data words being read into associated regulating value intermediate stores that are supplied with current from the speaking lines, either as volatile or non-volatile data, and in that all the regulating value intermediate stores are connected to associated storage locations of a non-volatile central store or else are themselves configured as components of the non-A volatile store into which the regulating value data words in provided for the individual intermediate stores can be read~r~m an external data source by means of a serial data bus; and in that all the adjustable amplifiers and resistors together with their associated intermediates stores with their power supply system that is supplied from the speaking lines and either the central store itself or the connectors for an external store and combined with all the connecting lines and switching systems into one component using integrated-circuit technology.
On the one hand, the present invention exploits the fact that apart from those components such as microphones, receivers, dial signal generators, and the like, which are not amenable to miniaturization because of potential manipulation problems, all the components are combined into one component using integrated-circuit technology. This results in a reduction in the number ofcomponents, which is important for efficient production. On the other hand, the use of inexpensive, volatile stores as intermediate stores, from which data is lost when there is no current, but which are written to once again from the central store prior to operation, results in a considerable reduction in the cost of the total system.
In accordance with the present invention there is provided circuit with adjustable amplifiers for microphones, recei~ers, loudspeakers, dial signal generators or the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems, drift-compensation systems, or the like, in use in telephone apparatuses or telephone systems or apparatuses that are connected to telephone lines or the like, with adjustable amplifiers and passive components that are dlgitally adjustable as a function of binary coded regulating value data words, wherein the regulating value data words can be read into associated regulating value intermediate stores that are powered through the speaking lines where they can be stored in ,,;
~298g24 4a 20365-2914 volatile or non-volatile form; and wherein all regulating value intermediate stores are connected to associated storage locations of a non-volatile central store or are themselves configured as components of the non-volatile central store, within which the regulating value data words provided for the individual intermediate stores can be read in from an external data source by means of a serial data bus; and wherein all the adjustable amplifiers and xesistances together with their associated intermediate stores with their power supply system that is powered through the speaking lines and either the central store itself or the connectors for an external central store with all the connecting lines and switching circuits are combined into a single component by integrated circuit technology.
The component parts of a telephone substation are shown in the drawing as an embodiment of the present invention; in this drawlng, those components that have been combined into a component by using integrated-circuit technology are set off from the other components by a dashed line.
The telephone subscriber substation shown in the drawing is connected to its associated connector set through its speaking wires 1, 2, the speaking line 2 also serving as the ground line.
The subscriber substation not only sends and receives speech information via the speaking lines, but it also draws supply .~`' ' ~.
~Z989Z4 current for all of its somponents through them. The voltage on line l is limited, to +18 V, for example, by a zener diode. A
hybrid circuit [four-wire terminating set] is numbered 4; on the one hand, this forms the line termination for the speaking lines l, 2 and, on the other, forms the output coupler for the incoming speech signals and the input coupler for the outgoing speech signals.
A balancing capacitor that forms part of an adjustable balancing circuit is numbered 5; with the help of a regulating device 6, this permits optimization of the line termination impedance which, as is known, is a function of line length. The regulating device 6, like all conventional regulating devices, is provided with an associated volatile or non-volatile regulating value intermediate store 6' that receives an impressed binary coded data word from a non-volatile central store 7 during operation of the system, or has stored a data word that represents the currently valid regulating value as a component of the non-volatile central store. In the case of the regulating device 6, this regulating value indicates a resistance value of an Ohmic resistance that is part of the hybrid circuit 4 (not shown in greater detail herein) which, in conjunction with the capacitor 5, forms the terminating impedance of the speaking lines l, 2.
The connections from the central store 7 to the individual re-gulating devices are indicated, on the one hand, by an arrow pointing out of the central store 7 and, on the other hand, by an arrow pointing to each individual regulating device. An additional capacitor 8 provides for balancing in order to optimise the voice traffic alternating current.
A voltage-power supply unit 9 is used to supply power to the components in the integrated circuit and to the components connected thereto; this unit 9 obtains its power through the speaking lines 1, 2 and has a dynamic characteristic that can be adapted to the regulations of various postal administrations (or other authorities) with regard to its power consumption. In order to do this, it is necessary to measure the current consump-tion, and this is done by means of a current-measuring resistance 10. The availability of temperature stabilized voltage is necessary for various systems within the integrated circuit, and this is supplied from a stabilizer 11. The regulating element 12 with its associated regulating element intermediate store 12' is used to regulate the dynamic characteristic that is required in each particular instance. A further regulating element 13 with an associated intermediate store 13' serves to regulate the line balancing network in the four-line terminating set 4, with the help of which the subscriber can adjust the level at which the level of his or her own speech is heard. If the power consumption of the apparatuses connected to the integrated com-ponent exceeds a preset threshold value, a signal generator 14 sends a warning signal. The threshold value needed to do this is provided from a regulating element with an associated intermediate store 15'.
Whereas up to now all the regulating elements used in conjunction with the power supply and the line matching have been mentioned, in the following, those regulating elements that are combined with adjustable amplifiers used for regulating the current of the microphone, receiver, and the dial system will be discussed. For all of these, a temperature compensation is pro-vided, for which a temperature compensation current is generated by means of a resistor 16 in conjunction with a regulating element 17 and an associated intermediate store 17', and this is passed to all of these amplifiers.
A speech signal that arrives through the speaking lines 1, 2 is passed from the four-line terminating set 4 along a line 18 to an amplifier 19, the amplification factor of which can be adjusted by means of a regulating element 20 with an associated intermediate store 20'. The output voltage of the amplifier 19 is inverted by a subsequent amplifier 21. Acoustic devices such as receiver capsules, microphones, etc., can be connected to the bridge amplifiers formed thereby.
The microphone provided for the outgoing voice traffic is numbered 23. A regulating element 24 with an associated inter-mediate store 24' is used to regulate the microphone current. A
switch 25 is also incorporated in the microphone circuit, and this is open during multi-frequency dialling. The microphone current is coupled into the integrated component through a capaci-tor 26 and from there it is passed to a microphone amplifier 27. This is provided with a regulating element 28 for regulating the amplification, and an intermediate store 28' is associated with this element 28. A potentiometer 29 with an additional regulating element 30 connected to its tap, and which has an associated intermediate store 30', is provided to regulate the frequency response of the microphone amplifier.
The output current of the microphone amplifier 27 passes through a reversing switch 31 and along a line 32 to the four-line terminating circuit 4, where the outgoing signal is coupled into the speaking lines 1, 2. An additional regulating element 33 with an associated intermediate store 33' which, together with an externally connected capacitor 34 forms a resistance-capacitance element, serves to further modify the outgoing signal.
Dialling signals are generated by means of a multi-frequency dialling signal generator 35. When the dialling signal generator 35 is activated, first the reversing switch 31 is moved from the position shown into its other position so that dialling signals transmitted through a capacitor 36 and amplified by a dialling signal amplifier 37 are passed in place of the microphone signals to the line 32 that leads to the four-line terminating set 4. The amplification factor of the dialling signal amplifier 37 can be adjusted by means of a regulating element 38, the associated intermediate store of which is numbered 38'. Thus the level of the dialling signals can be adjusted.
In the embodiment shown, either an EAROM (electrical alterable read only memory) or an EEROM (electrical erasable read only memory) serves as a central store. The store locations of the central store 7 associated with the individual intermediate stores have the appropriate data applied to them by means of a serial data bus 39, through an external device. A
logic circuit 40 that precedes the central store 7 is used for this. An answering line 41 provides external control of the data that is stored. However, it is also possible to configure the central store as an external device, the data of which is passed to the individual intermediate stores through suitable connections.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Circuit with adjustable amplifiers for microphones, receivers, loudspeakers, dial signal generators or the like and/or adjustable or simulated resistances for impedance matching, filter functions, frequency-correction systems, drift-compensation systems, or the like, in use in telephone apparatuses or telephone systems or apparatuses that are connected to telephone lines or the like, with adjustable amplifiers and passive components that are digitally adjustable as a function of binary coded regulating value data words, wherein the regulating value data words can be read into associated regulating value intermediate stores that are powered through the speaking lines where they can be stored in volatile or non-volatile form; and wherein all regulating value intermediate stores are connected to associated storage locations of a non-volatile central store or are themselves configured as components of the non-volatile central store, within which the regulating value data words provided for the individual inter-mediate stores can be read in from an external data source by means of a serial data bus; and wherein all the adjustable ampli-fiers and resistances together with their associated intermediate stores with their power supply system that is powered through the speaking lines and either the central store itself or the connec-tors for an external central store with all the connecting lines and switching circuits are combined into a single component by integrated circuit technology.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT207/88A AT392556B (en) | 1988-02-02 | 1988-02-02 | CIRCUIT ARRANGEMENT WITH ADJUSTABLE AMPLIFIERS AND OR OR ADJUSTABLE RESISTANCE |
| ATA207/88 | 1988-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1298924C true CA1298924C (en) | 1992-04-14 |
Family
ID=3484329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000589607A Expired - Fee Related CA1298924C (en) | 1988-02-02 | 1989-01-31 | Circuit that incorporates passive and active components |
Country Status (10)
| Country | Link |
|---|---|
| EP (2) | EP0380819A1 (en) |
| JP (1) | JPH03502993A (en) |
| AT (2) | AT392556B (en) |
| CA (1) | CA1298924C (en) |
| DK (1) | DK178990A (en) |
| ES (1) | ES2027071T3 (en) |
| GR (1) | GR3003524T3 (en) |
| PT (1) | PT89594B (en) |
| WO (1) | WO1989007366A1 (en) |
| ZA (1) | ZA89816B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4124585A1 (en) * | 1991-07-24 | 1993-01-28 | Siemens Ag | CONTROLLABLE CIRCUIT ARRANGEMENT |
| US5634592A (en) * | 1994-04-07 | 1997-06-03 | Flow-Rite Controls, Ltd. | Flow control apparatus and method for making same |
| US20040179702A1 (en) * | 2003-03-11 | 2004-09-16 | Boor Steven E. | Transducer assembly with modifiable buffer circuit and method for adjusting thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2448193B1 (en) * | 1979-02-01 | 1985-12-06 | Michel Andre | MULTI-CHANNEL ELECTRONIC ATTENUATOR WITH STORED SETTINGS AND VISUALIZED BY LIGHT EMITTING DIODES |
| GB8322440D0 (en) * | 1983-08-19 | 1983-09-21 | Gen Electric Co Plc | Frequency division multiplex transmission equipment |
| AT379929B (en) * | 1984-07-18 | 1986-03-10 | Viennatone Gmbh | HOERGERAET |
| DE3642828C3 (en) * | 1986-02-03 | 1995-05-04 | Toepholm & Westermann | Remote controllable hearing aid |
-
1988
- 1988-02-02 AT AT207/88A patent/AT392556B/en not_active IP Right Cessation
-
1989
- 1989-01-31 CA CA000589607A patent/CA1298924C/en not_active Expired - Fee Related
- 1989-02-01 ES ES8989902032T patent/ES2027071T3/en not_active Expired - Lifetime
- 1989-02-01 AT AT89902032T patent/ATE68923T1/en not_active IP Right Cessation
- 1989-02-01 WO PCT/EP1989/000083 patent/WO1989007366A1/en active IP Right Grant
- 1989-02-01 EP EP89200357A patent/EP0380819A1/en active Pending
- 1989-02-01 JP JP1501879A patent/JPH03502993A/en active Pending
- 1989-02-01 EP EP89902032A patent/EP0389569B1/en not_active Expired - Lifetime
- 1989-02-02 PT PT89594A patent/PT89594B/en active IP Right Grant
- 1989-02-02 ZA ZA89816A patent/ZA89816B/en unknown
-
1990
- 1990-07-27 DK DK178990A patent/DK178990A/en not_active Application Discontinuation
-
1992
- 1992-01-08 GR GR910401677T patent/GR3003524T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03502993A (en) | 1991-07-04 |
| DK178990D0 (en) | 1990-07-27 |
| PT89594A (en) | 1989-10-04 |
| AT392556B (en) | 1991-04-25 |
| EP0389569B1 (en) | 1991-10-23 |
| EP0389569A1 (en) | 1990-10-03 |
| DK178990A (en) | 1990-07-27 |
| WO1989007366A1 (en) | 1989-08-10 |
| ZA89816B (en) | 1990-06-27 |
| ATE68923T1 (en) | 1991-11-15 |
| PT89594B (en) | 1994-01-31 |
| EP0380819A1 (en) | 1990-08-08 |
| ES2027071T3 (en) | 1992-05-16 |
| GR3003524T3 (en) | 1993-03-16 |
| ATA20788A (en) | 1990-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |