US3792339A — Control device for an inverted converter

Claim 1

Independent Claim 150 words

A control device adapted for use with an inverted converter, said control device comprising: a sawtooth voltage generator which generates a sawtooth voltage having upper and lower reversal points and which generates auxiliary pulse trains; means for generating a comparison voltage; a comparator stage which receives said sawtooth voltage from said sawtooth voltage generator and said comparison voltage from said means, said comparator stage having outputs at which pulse trains are produced; and a switching circuit which receives pulse trains from said comparator stage and auxiliary pulse trains from said sawtooth voltage generator, said pulse trains from said comparator stage being derived from said sawtooth voltage, the auxiliary pulses of said auxiliary pulse train representing the time of said reversal points of said sawtooth voltage, said switching circuit producing pulse trains which contain only one pulse per period of said sawtooth voltage and which are applied to said inverted converter.

Claim 2

Dependent Claim 150 words

A control device adapted for use with an inverted converter, said control device comprising: a sawtooth voltage generator which generates a sawtooth voltage having upper and lower reversal points and which generates auxiliary pulse trains; means for generating a comparison voltage; a comparator stage which receives said sawtooth voltage from said sawtooth voltage generator and said comparison voltage from said means, said comparator stage having outputs at which pulse trains are produced; and a switching circuit which receives pulse trains from said comparator stage and auxiliary pulse trains from said sawtooth voltage generator, said pulse trains from said comparator stage being derived from said sawtooth voltage, the auxiliary pulses of said auxiliary pulse train representing the time of said reversal points of said sawtooth voltage, said switching circuit producing pulse trains which contain only one pulse per period of said sawtooth voltage and which are applied to said inverted converter.

Claim 3

Dependent Claim 70 words

The control device according to claim 1 wherein said switching circuit comprises two gates and a memory stage, said memory stage of said switching circuit being set by said pulse trains from said comparator stage and said auxiliary pulse trains from said sawtooth voltage generator in only one direction during one leg of said sawtooth voltage and in only the other direction during the following leg of said sawtooth voltage.

Claim 4

Dependent Claim 97 words

The control device according to claim 1 wherein said sawtooth voltage generator produces two said auxiliary pulse trains and wherein the duration of the auxiliary pulses of the auxiliary pulse trains from said sawtooth voltage generator substantially correspond to the separation between the reversal points of the sawtooth voltage, the leading edges of the auxiliary pulses of one auxiliary pulse train substantially coinciding with the upper reversal points of the sawtooth voltage and the leading edges of the auxiliary pulses of the other auxiliary pulse train substantially coinciding with the lower reversal points of the sawtooth voltage.

Claim 5

Dependent Claim 139 words

The control device according to claim 2 wherein said comparator stage produces two pulse trains and comprises an inverter stage and wherein said switching circuit comprises a first NAND-gate and a second NAND-gate, said first NAND-gate and said second NAND-gate each having two inputs, one pulse train from said comparator stage being applied directly to one input of said first NAND-gate in said switching circuit and the other pulse train from said camparator stage being applied through said inverter stage to one input of said second NAND-gate in said switching circuit, the second input of each said first and second NAND-gates in said switching circuit receiving one of said auxiliary pulse trains from said sawtooth voltage generator and the outputs of said first and second NAND-gates being connected to the inputs of the memory stage of said switching circuit.

Claim 6

Dependent Claim 145 words

The control device according to claim 1 wherein said sawtooth voltage generator comprises a first limit stage, a second limit stage and a memory stage, said memory stage of said sawtooth voltage generator producing a first auxiliary pulse train and a second auxiliary pulse train, said first auxiliary pulse train corresponding substantially to the upper reversal points of said sawtooth voltage and said second auxiliary pulse train corresponding substantially to the lower reversal points of said sawtooth voltage, said first limit stage producing a first pulse train and said second limit stage producing a second pulse train, the pulses of said first pulse train corresponding substantially to the upper reversal points of said sawtooth voltage and the pulses of said second pulse train corresponding to the lower reversal points of said sawtooth voltage, said auxiliary pulses being derived from said first and second pulse trains.

Claim 7

Dependent Claim 20 words

The control device according to claim 5 wherein said memory stage of said sawtooth voltage generator follows said limit stages.

Claim 8

Dependent Claim 140 words

The control device according to claim 1 wherein said sawtooth voltage generator further comprises: an integrator having inputs and an output at which said sawtooth voltage is generated having upper and lower reversal points; a plurality of limit stages which generate pulse trains, the pulses of which correspond to the upper and lower reversal points of said sawtooth voltage; a reference voltage; a first switch and a second switch for transmitting sequentially positive and negative integrator input voltages respectively to the input of said integrator, said input voltages being proportional to a reference voltage said limit stages having respective inputs for receiving respective datum voltages proportional to the reference voltage, said switches being controlled by said pulse trains from said limit stages and said switches being alternately opened and closed whenever a reversal point of said sawtooth voltage is reached.

Claim 9

Dependent Claim 50 words

The control device according to claim 7 wherein said sawtooth voltage generator further comprises a first voltage divider to which said reference voltage is applied and from which a voltage is derived, said voltage being at least one of the input voltages applied alternately to the input of said integrator.

Claim 10

Dependent Claim 37 words

The control device according to claim 7 and further comprising a second voltage divider to which said reference voltage is applied and from which at least one of said datum voltages from said limit stages is derived.

Claim 11

Dependent Claim 40 words

The control device according to claim 7 wherein said sawtooth voltage generator further comprises an inverting amplifier for said integrator, at least one of said input voltages which is applied alternately to said integrator being derived from said inverting amplifier.

Claim 12

Dependent Claim 99 words

The control device according to claim 7 and further comprising upper and lower limiting voltages for said comparison voltage and wherein said comparator stage further comprises a first input and a second input, said sawtooth voltage from said sawtooth voltage generator being applied to said first input of said comparator stage, said comparison voltage being applied to the second input of said comparator stage, said comparison voltage being limited by an upper and lower limiting voltages whose magnitude lies between the reversal points of said sawtooth voltage, said upper and lower limiting voltages being proportion to said reference voltage.

Claim 13

Dependent Claim 45 words

The control device according to claim 11 wherein said means for generating said comparison voltage is a regulator, said regulator comprising a regulator amplifier and at least one voltage divider, said voltage divider providing said regulator amplifier with limiting voltages to limit said comparison voltage.

Claim 14

Independent Claim 94 words

A method for the control of an inverted converter by use of a control device, comprising: generating a sawtooth voltage and auxiliary pulse trains, the pulses of said auxiliary pulse trains representing the time of the reversal points of said sawtooth voltage; applying said auxiliary pulse trains and pulses derived from said sawtooth voltage to a switching circuit; producing pulse trains from the output of said switching circuit which contain only one pulse per period of the sawtooth voltage; and applying said pulses from the output of said switching circuit to said inverted converter.

Claim 15

Independent Claim 94 words

A method for the control of an inverted converter by use of a control device, comprising: generating a sawtooth voltage and auxiliary pulse trains, the pulses of said auxiliary pulse trains representing the time of the reversal points of said sawtooth voltage; applying said auxiliary pulse trains and pulses derived from said sawtooth voltage to a switching circuit; producing pulse trains from the output of said switching circuit which contain only one pulse per period of the sawtooth voltage; and applying said pulses from the output of said switching circuit to said inverted converter.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-02-11	1977-08-13	1978-02-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-02-11	1981-08-13	1982-02-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-02-11	1985-08-13	1986-02-12	$7700.00	Window Closed / Lapsed

Control device for an inverted converter

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