US3903433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television channel selector
Assignee: Texas Instruments Inc
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Filing: 1974-05-22
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Granted: 1975-09-02
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Expires: 1994-05-22
Abstract
Abstract An electronic channel selector switching system for television receivers embodied in five integrated circuit devices of two types, one device of the first type providing the functions of an up-down counter, partial decoder, clock oscillator, regulated power supply, input signal latch and distributor, AFC defeatsound muting and counter preset-at-power-on, each of the other four integrated circuit devices being of a second type having four analog switching devices each operative to connect a different standard tuning voltage to a common output, four driver switches each operative in parallel with one of the analog switches to apply a driver voltage to a different channel indicator output and means to disable all of the switches of the device.
Inventors
- 👤 Horst Leuschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/0218; H03J5/0227; H03J1/00; H03J1/18; H03J1/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
364 words
An electronic channel selector switching system for television receivers comprising: first, second, third, fourth and fifth integrated circuit devices; said first integrated circuit device having first and second command signal input terminals, nine selector signal output terminals and five additional terminals and containing interconnected circuit elements functional to be activated by input signals of one type to one of said input terminals to activate said first and second output terminals alternately periodically during the continued application of said one type input signal and to activate one of said third through ninth output terminals individually exclusively and periodically in sequence during the continued application of said one type input signal; the second through fifth integrated circuit devices each having first through fourth analog voltage input terminals, first through fourth switch activator input terminals, first through fourth drive voltage output terminals, a disable terminal, an analog voltage output terminal and two additional terminals and containing interconnected circuit elements functional to connect one of said first through fourth analog voltage input terminals to said analog voltage output terminal in dependence on an input signal being received at one of said first through fourth switch activator input terminals and to apply a drive voltage to one of first through fourth drive voltage output terminals in dependence upon an input signal being received at one of said first through fourth switch activator input terminals and to prevent any output connections during the application of an activating signal to said disable terminal; said first output terminal of said first integrated circuit device being connected to said disable terminals of each said second and third integrated circuit device, said second output terminal of said first integrated circuit device being connected to said disable terminals of each said fourth and fifth integrated circuit devices, said third through sixth output terminals of said first integrated circuit device being connected to said first through fourth switch activator input terminals respectively of each said second and fourth integrated circuit devices and said seventh through ninth output terminals of said integrated integratee circuit device being connected to said first through third switch activator input terminals respectively of each of said third and fifth integrated circuit devices.
Claim 2
Dependent Claim
364 words
An electronic channel selector switching system for television receivers comprising: first, second, third, fourth and fifth integrated circuit devices; said first integrated circuit device having first and second command signal input terminals, nine selector signal output terminals and five additional terminals and containing interconnected circuit elements functional to be activated by input signals of one type to one of said input terminals to activate said first and second output terminals alternately periodically during the continued application of said one type input signal and to activate one of said third through ninth output terminals individually exclusively and periodically in sequence during the continued application of said one type input signal; the second through fifth integrated circuit devices each having first through fourth analog voltage input terminals, first through fourth switch activator input terminals, first through fourth drive voltage output terminals, a disable terminal, an analog voltage output terminal and two additional terminals and containing interconnected circuit elements functional to connect one of said first through fourth analog voltage input terminals to said analog voltage output terminal in dependence on an input signal being received at one of said first through fourth switch activator input terminals and to apply a drive voltage to one of first through fourth drive voltage output terminals in dependence upon an input signal being received at one of said first through fourth switch activator input terminals and to prevent any output connections during the application of an activating signal to said disable terminal; said first output terminal of said first integrated circuit device being connected to said disable terminals of each said second and third integrated circuit device, said second output terminal of said first integrated circuit device being connected to said disable terminals of each said fourth and fifth integrated circuit devices, said third through sixth output terminals of said first integrated circuit device being connected to said first through fourth switch activator input terminals respectively of each said second and fourth integrated circuit devices and said seventh through ninth output terminals of said integrated integratee circuit device being connected to said first through third switch activator input terminals respectively of each of said third and fifth integrated circuit devices.
Claim 3
Dependent Claim
43 words
An electronic channel selector switching system for television receivers as defined in claim 1 wherein said third through ninth output terminals are activated in reverse sequence during the continued application of said one type input signal at the other of said input terminals.
Claim 4
Dependent Claim
65 words
An electronic channel selector switching system for television receivers as defined in claim 1 wherein one of said five additional terminals of said first integrated circuit device constitutes a tenth output terminal activated individually exclusively and periodically in sequence with said third through ninth output terminals and is connected to said fourth switch activator terminal of each of said third and fifth integrated circuit devices.
Claim 5
Dependent Claim
65 words
An electronic channel selector switching system for television receivers as defined in claim 2 wherein one of said five additional terminals of said first integrated circuit device constitutes a tenth output terminal activated individually exclusively and periodically in sequence with said third through ninth output terminals and is connected to said fourth switch activator terminal of each of said third and fifth integrated circuit devices.
Claim 6
Dependent Claim
154 words
An electronic channel selector switching system for television receivers as defined in claim 2 further comprising means external of said integrated circuit devices and responsive to a received signal of a first type to apply an input signal of said one type to said first command signal input terminal of said first integrated circuit device and responsive to a received signal of a second type to apply an input signal of said one type to said second command signal input terminal of said first integrated circuit device, said means being further responsive to a received signal of either said first type or said second type to connect circuit elements external of said integrated circuit devices to one of said five additional terminals of said first integrated circuit device said external circuit elements being operative to establish the rate at which said output terminals of said first integrated circuit device are sequentially and alternately activated.
Claim 7
Dependent Claim
66 words
An electronic channel selector switching system for television receivers as defined in claim 5 wherein a second of said five additional terminals of said first integrated circuit device constitutes a tenth output terminal activated individually exclusively and periodically in sequence with said third through ninth output terminals and is connected to said fourth switch activator input terminal of each said third and fifth integrated circuit devices.
Claim 8
Dependent Claim
65 words
An electronic channel selector switching system for television receivers as defined in claim 5 wherein said received signal of a first type is an ultrasonic signal of a first frequency and said received signal of a second type is an ultrasonic signal of a second frequency and said rate established produces an activation period for each output terminal activated of greater than one half second.
Claim 9
Dependent Claim
66 words
An electronic channel selector switching system for television receivers as defined in claim 7 wherein a second of said five additional terminals of said first integrated circuit device constitutes a tenth output terminal activated individually exclusively and periodically in sequence with said third through ninth output terminals and is connected to said fourth switch activator input terminal of each said third and fifth integrated circuit devices.
References Cited (Backward Citations)
US3654557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |