US3568070A
Expired / Lapsed
US
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Decade-type frequency divider
Assignee: US Philips Corp
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Filing: 1968-04-05
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Granted: 1971-03-02
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Expires: 1988-04-05
Abstract
Abstract A frequency divider operating in cascaded decades with selection switches adjustable for selecting from each decade the desired control signal and a gating network for combining the outputs of the respective decade switches for producing a time uniform divided pulse sequence.
Inventors
- 👤 Gerhard Kaps
- 👤 Heinz-Peter Kunert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:46
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/64; H03K23/66; G; G06; G06F; G06F7/00; G06F7/60; G06F7/68; H03K3/00; H03K3/78
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A frequency divider operating in cascaded decades for producing pulse sequences in a number finely adjustable in decades and substantially uniformly time distributed from an input pulse sequence of 10m pulses, each of said divider decades comprising five bistable triggers, each having one or more first input means, second input means and a clock pulse input means, means coupling said input pulse sequence to said clock pulse input means, means coupling a constant potential signal to said second input means, means coupling a control signal to said one or more first input means, said control signal derived from combinations of respective bistable trigger output signals, and said bistable trigger responsive to said input pulses and said control signals for providing a number of n from 10 input pulses at the respective outputs of said bistable triggers, adjustable means coupled to each of said decades in said divider for adjustable selecting a desired control signal, and combining means coupled to each of said adjustable means for combining signals supplied by said cascaded decades for producing the divided pulse sequence.
Claim 2
Dependent Claim
178 words
A frequency divider operating in cascaded decades for producing pulse sequences in a number finely adjustable in decades and substantially uniformly time distributed from an input pulse sequence of 10m pulses, each of said divider decades comprising five bistable triggers, each having one or more first input means, second input means and a clock pulse input means, means coupling said input pulse sequence to said clock pulse input means, means coupling a constant potential signal to said second input means, means coupling a control signal to said one or more first input means, said control signal derived from combinations of respective bistable trigger output signals, and said bistable trigger responsive to said input pulses and said control signals for providing a number of n from 10 input pulses at the respective outputs of said bistable triggers, adjustable means coupled to each of said decades in said divider for adjustable selecting a desired control signal, and combining means coupled to each of said adjustable means for combining signals supplied by said cascaded decades for producing the divided pulse sequence.
Claim 3
Dependent Claim
136 words
The combination of claim 1 wherein said adjustable means includes a decade switch coupled to each of said decades, and said combining means includes a first AND gate coupled to the last decade responsive to a coincidence of the input pulses to said decade and the output of said decade switch, a plurality of summation stages each respectively responsive to the output of the prior decade stage AND gate output, the input pulses of the associated decade and the output of the associated decade switch for providing an output signal combined in a second AND gate in coincidence with the input pulses of the associated decade, each second AND gate output coupled as an input to the next successively higher decade summation stage, the output of the final decade AND gate producing the divided, pulse sequence.
Claim 4
Dependent Claim
162 words
The combination of claim 1 wherein said adjustable means includes, for the last divider decade, a decade switch having a first output control signal, and in further divider decades, by decade switches having two switching levels relatively offset and responsive to the respective countiNg decade outputs for providing a first output control signal corresponding to an adjusted number and a second output control signal corresponding to the adjusted number plus one, each of said decades including a first AND gate having an output responsive to a coincidence of inputs derived from said second output control signal and an output from the prior stage, and a second AND gate having an output responsive to a coincidence of inputs derived from said first output control signal and the inversion of said prior stage output, said prior stage output formed by OR gate combination of said first and second AND gate outputs, and for said last stage output by the output of said decade switch.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |