Patent US3605023A successfully refreshed from Google Patents.
US3605023A
Expired / Lapsed
US
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Frequency divider
Assignee: Motorola Solutions Inc
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Filing: 1969-08-11
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Granted: 1971-09-14
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Expires: 1989-08-11
Abstract
Abstract A frequency divider is disclosed which comprises one divide-bytwo divider or a plurality of cascaded divide-by-two dividers. The input of the divide-by-two divider or of the cascaded divideby-two dividers is through a balanced modulator. The output of the divide-by-two divider or of the cascaded divide-by-two dividers which is the output of the disclosed frequency divider is fed back to the other input of the modulator.
Inventors
- 👤 Arthur Jonathan Kline Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:42
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01; H03B21/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A frequency divider comprising: at least one divide-by-two having an input and an output terminal, said divide-by-two comprising a respective first modulator having two input terminals and an output terminal and an amplifier, the output terminal of said first modulator being connected to the input of said amplifier, the input of said divide-by-two being the other input terminal of said modulator and the output of said divide-by-two being the output of said amplifier, a connection of the output of said amplifier to the other input terminal of said first modulator, a second modulator having two inputs and an output, means for applying a wave whose frequency is to be divided to one input of said second modulator, means for applying the output of said divide-by-two to the other input of said second modulator, means to connect the output of said second modulator to the input of said divide-by-two and means to take a wave of divided frequency from the output of said divide-by-two.
Claim 2
Dependent Claim
163 words
A frequency divider comprising: at least one divide-by-two having an input and an output terminal, said divide-by-two comprising a respective first modulator having two input terminals and an output terminal and an amplifier, the output terminal of said first modulator being connected to the input of said amplifier, the input of said divide-by-two being the other input terminal of said modulator and the output of said divide-by-two being the output of said amplifier, a connection of the output of said amplifier to the other input terminal of said first modulator, a second modulator having two inputs and an output, means for applying a wave whose frequency is to be divided to one input of said second modulator, means for applying the output of said divide-by-two to the other input of said second modulator, means to connect the output of said second modulator to the input of said divide-by-two and means to take a wave of divided frequency from the output of said divide-by-two.
Claim 3
Dependent Claim
13 words
The invention as expressed in claim 1 in which said modulator is balanced.
Claim 4
Dependent Claim
137 words
A frequency divider comprising: at least one divide-by-two having an input and an output terminal, a modulator having two inputs and an output, means for applying a wave Whose frequency is to be divided to one input of said modulator, means for applying the output of said divide-by-two to the other input of said modulator, means to connect the output of said modulator to the input of said divide-by-two, a plurality of divide-by-twos being cascaded, each divide-by-two comprising a respective amplifier and a respective modulator, each respective modulator having two inputs and an output, the output of each respective modulator being applied to its respective amplifier and the output of the respective amplifier being applied to one input of its respective modulator, the output of an amplifier being applied to the other input of the first-mentioned modulator.
Claim 5
Dependent Claim
137 words
A frequency divider comprising: at least one divide-by-two having an input and an output terminal, a modulator having two inputs and an output, means for applying a wave Whose frequency is to be divided to one input of said modulator, means for applying the output of said divide-by-two to the other input of said modulator, means to connect the output of said modulator to the input of said divide-by-two, a plurality of divide-by-twos being cascaded, each divide-by-two comprising a respective amplifier and a respective modulator, each respective modulator having two inputs and an output, the output of each respective modulator being applied to its respective amplifier and the output of the respective amplifier being applied to one input of its respective modulator, the output of an amplifier being applied to the other input of the first-mentioned modulator.
Claim 6
Dependent Claim
28 words
The invention as expressed in claim 3 in which a filter is connected between the output of said first mentioned modulator and the input of said cascaded divide-by-twos.
Claim 7
Dependent Claim
33 words
The invention as expressed in claim 3 in which a filter and an amplifier are connected in cascade between the output of said first mentioned modulator and the input of said cascaded divide-by-twos.
Claim 8
Dependent Claim
22 words
The invention as expressed in claim 1 in which said divide-by-two includes a filter connected between said amplifier and said first modulator.
Claim 9
Dependent Claim
15 words
The invention as expressed in claim 6 in which each of said modulators is balanced.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |