US3581185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric circuit for generating a programmable multiphase alternating current
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1968-12-16
•
Granted: 1971-05-25
•
Expires: 1988-12-16
Abstract
Abstract A circuit for producing a multiphase alternating current which may be programmed in wave shape, includes a separate oscillator producing an alternating signal for each phase, a ring counter receiving the output of the oscillator whose stages deliver successive outputs which subdivide a given period, an interrogating switching circuit connected to each output of the ring counter and to a separate bar of a crossbar distribution panel for receiving a characteristic voltage from that bar and switching it to the input of an amplifier upon receiving a pulse from the associated output of the ring counter. Circuit elements for shifting the phase relationship include a bistable circuit means having a first input connected with one stage of one ring counter and a second input connected to a stage of another ring counter, an averaging circuit for averaging the output signals of the bistable circuit means, and means utilizing the said averaged signals for supplying an input signal to one of the oscillators. The frequency of the oscillator signals may be directly varied by the input signal to vary the frequency and, consequently, the phase relationship of the multiphase signal.
Inventors
- 👤 Heinz Hermes
- 👤 Klaus-Dietrich Thieme
- 👤 Willi Gatermann
- 👤 Peter Koerv
- 👤 Walter Mehnert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:07
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; G; G06; G06F; G06F1/00; G06F1/02; G06F1/03; G06F1/0321; H03K4/00; H03K4/02; H03K4/026; H03K5/15; H03K5/15013; H03K5/1506; H03K5/15093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
An electric circuit for generating an alternating current signal having m phases, where m is at least equal to three, which can be arbitrarily programmed with respect to its wave shape and arbitrarily modulated with respect to its frequency and/or phase position comprising in combination: a. a ring counter means having n stages associated with each phase, whose n stages subdivide a period n times, and each stage of which has an output; b. interrogatory circuit means connected to each output of the ring Counter; c. a crossbar distribution panel having n bars, and means connecting each interrogatory circuit with one of the bars, and means supplying a specified electric potential to each bar; d. amplifier means associated with each interrogatory circuit means; e. means for switching the interrogatory circuit means to the amplifier means; f. oscillator means associated with each phase and means connecting the output of each oscillator with the first stage of an associated ring counter.
Claim 2
Dependent Claim
159 words
An electric circuit for generating an alternating current signal having m phases, where m is at least equal to three, which can be arbitrarily programmed with respect to its wave shape and arbitrarily modulated with respect to its frequency and/or phase position comprising in combination: a. a ring counter means having n stages associated with each phase, whose n stages subdivide a period n times, and each stage of which has an output; b. interrogatory circuit means connected to each output of the ring Counter; c. a crossbar distribution panel having n bars, and means connecting each interrogatory circuit with one of the bars, and means supplying a specified electric potential to each bar; d. amplifier means associated with each interrogatory circuit means; e. means for switching the interrogatory circuit means to the amplifier means; f. oscillator means associated with each phase and means connecting the output of each oscillator with the first stage of an associated ring counter.
Claim 3
Dependent Claim
91 words
The circuit of claim 1 including: g. (m-1) bistable circuit means for shifting phase with the input of the L-th bistable circuit means connected with one stage of one ring counter taken as a reference, and with one stage of the (L+1)-th ring counter; h. averaging circuit means associated with each bistable circuit means for forming an average actual value from the outputs of the bistable circuits and for delivering a control deviation signal comprising the difference between the said actual value and a supplied nominal value to the (L+1)-th oscillator.
Claim 4
Dependent Claim
34 words
A circuit according to claim 1 in which the connections of the stages of the ring counter with the associated bistable circuit means are so arranged that the signals are displaced 180* in phase.
Claim 5
Dependent Claim
77 words
A circuit according to claim 1 in which the last stage of each ring counter is connected with a logic circuit means for switching back the last stage of the ring counter to the first stage of the ring counter and monitoring circuit means connected to the first stage of the ring counter means for initiating a pulse from the logic circuit when no pulse appears at the input of the ring counters in a given time.
Claim 6
Dependent Claim
39 words
A circuit according to claim 1 including clearing circuit means for clearing the pulses of all but the first and last stages of a ring counter when a pulse is delivered from the last stage of the ring counter.
Claim 7
Dependent Claim
152 words
An electric circuit for generating an alternating current signal having m phases, where m is at least equal to three, which can be arbitrarily programmed with respect to its wave shape and arbitrarily modulated with respect to its frequency and/or phase position comprising in combination: m oscillator means one of which is associated with each phase and each delivering an alternating signal; ring counter means connected to the output of each oscillator including means for subdividing a given period into n stages and delivering n successive outputs; a bistable circuit means having a first input connected to a stage of one ring counter, and a second input connected to a stage of another ring counter; averaging circuit means for forming an average value from the output of the bistable circuit and for delivering an output signal to one of the oscillators to shift the phase of its signal relative to another oscillator.
Claim 8
Dependent Claim
152 words
An electric circuit for generating an alternating current signal having m phases, where m is at least equal to three, which can be arbitrarily programmed with respect to its wave shape and arbitrarily modulated with respect to its frequency and/or phase position comprising in combination: m oscillator means one of which is associated with each phase and each delivering an alternating signal; ring counter means connected to the output of each oscillator including means for subdividing a given period into n stages and delivering n successive outputs; a bistable circuit means having a first input connected to a stage of one ring counter, and a second input connected to a stage of another ring counter; averaging circuit means for forming an average value from the output of the bistable circuit and for delivering an output signal to one of the oscillators to shift the phase of its signal relative to another oscillator.
Claim 9
Dependent Claim
67 words
The circuit of claim 6 in which there are (m-1) bistable circuit means each having its first input connected to a common reference ring counter and its second input connected to a different ring counter and in which the output signal of each bistable circuit is furnished to the oscillator associated with the ring counter to which the second input of the bistable circuit means is attached.
Claim 10
Dependent Claim
50 words
The circuit of claim 6 in which the means for delivering the signal to the oscillator includes means for supplying a desired nominal voltage to the actual output of the said averaging means and for supplying the difference between said actual output and said nominal voltage to the oscillator means.
Claim 11
Dependent Claim
31 words
The circuit of claim 6 in which the connections of the stages of the ring counters with the bistable circuit are so selected that the signals are displaced 180* in phase.
References Cited (Backward Citations)
US2749496A
Cited
US3200321A
Cited
US3177420A
Cited
US3152297A
Cited
US3256244A
Cited
US3274480A
Cited
US3324376A
Cited
US3317811A
Cited
US3391323A
Cited
US3419785A
Cited
US3430073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |