Voltage booster

Claim 2

A voltage booster comprising, in combination, an inductive reactance, a junction point, a rectifier, and a storage capacitor connected in series across an input line; an output line connected across the capacitor; intermittently operable switching means connecting the junction point to the input so as to short circuit the reactance across the input when closed; a multivibrator controlling operation of the switching means, the multivibrator including a timing capacitor charged from the said junction point when the switch means is open and discharged when the switch means is closed; a mixing circuit including a point with a potential responsive to input and output potentials of the booster; and connecting means effective to limit potential swings of the timing capacitor relative to the potential at the said point.

Claim 3

A voltage booster comprising, in combination, an inductive reactance, a junction point, a rectifier, and a storage capacitor connected in series across an input line; an output line connected across the capacitor; intermittently operable switching means connecting the junction point to the input so as to short circuit the reactance across the input when closed; a multivibrator controlling operation of the switching means, the multivibrator including a timing capacitor charged from the said junction point when the switch means is open and discharged when the switch means is closed; the multivibrator being in one condition in response to charging of the timing capacitor and in the opposite condition in response to discharge of the timing capacitor; the duty cycle of the switching means being responsive to the relative duration of two said conditions of the multivibrator; a mixing circuit including a point with a potential responsive to input and output potentials of the booster; and connecting means effective to limit potential swings of the timing capacitor relative to the potential at the said point.

Claim 4

A voltage booster comprising, in combination, an inductive reactance, a junction point, a rectifier, and a storage capacitor connected in series across an input line; an output line connected across the capacitor; intermittently operable switching means connecting the junction point to the input so as to short circuit the reactance across the input when closed; a multivibrator controlling operation of the switching means, the multivibrator including a timing capacitor charged from the said junction point when the switch means is open and discharged when the switch means is closed; the multivibrator being in one condition in response to charging of the timing capacitor and in the opposite condition in response to discharge of the timing capacitor; the duty cycle of the switching means being responsive to the relative duration of two said conditions of the multivibrator; a mixing circuit including a point with a potential responsive to input and output potentials of the booster; and connecting means effective to limit potential swings of the timing capacitor relative to the potential at the said point.

Claim 5

A circuit for supplying a controlled potential D.C. output from a D.C. source with potential varying over a range including potentials smaller than that of the output, the circuit comprising, in combination, a datum line connecting one side of the source to one side of the output, an inductive reactor and switch means connected in series across the source, a storage capacitor connected across the output, a unidirectional current device connecting a first junction between the reactor and switch means to the storage capacitor and output, and oscillator means effective to open and close the switch means, characterized by oscillator means including mixer means for developing a control potential responsive to both the output and input potentials; a first resistor connected to the output and a first transistor connecting the datum line to the first resistor through the emitter-collector circuit of the transistor; a second resistor connected to the datum line and a second transistor connecting the said junction to the second resistor through the collector-emitter circuit of the second transistor; the base of the second transistor being connected to the collector of the first transistor; potential difference limiting means connecting the mixer means to a second junction connected to the base of the first transistor; a resistor and a feedback capacitor connected in series between the first and second junctions; and a resistor connected between the second junction and the emitter of the second transistor; tHe second transistor being effective to hold the switch means closed when conducting, the said transistors operating as a relaxation oscillator of variable duty cycle responsive to voltage booster input and output potentials to cycle the switch means between open and closed conditions.

Claim 6

A circuit for supplying a controlled potential D.C. output from a D.C. source with potential varying over a range including potentials smaller than that of the output, the circuit comprising, in combination, a datum line connecting one side of the source to one side of the output, an inductive reactor and switch means connected in series across the source, a storage capacitor connected across the output, a unidirectional current device connecting a first junction between the reactor and switch means to the storage capacitor and output, and oscillator means effective to open and close the switch means, characterized by oscillator means including mixer means for developing a control potential responsive to both the output and input potentials; a first resistor connected to the output and a first transistor connecting the datum line to the first resistor through the emitter-collector circuit of the transistor; a second resistor connected to the datum line and a second transistor connecting the said junction to the second resistor through the collector-emitter circuit of the second transistor; the base of the second transistor being connected to the collector of the first transistor; potential difference limiting means connecting the mixer means to a second junction connected to the base of the first transistor; a resistor and a feedback capacitor connected in series between the first and second junctions; and a resistor connected between the second junction and the emitter of the second transistor; tHe second transistor being effective to hold the switch means closed when conducting, the said transistors operating as a relaxation oscillator of variable duty cycle responsive to voltage booster input and output potentials to cycle the switch means between open and closed conditions.

Claim 7

A circuit for supplying a substantially constant potential D.C. output from a D.C. source with potential varying over a range from greater than to smaller than that of the output, the circuit comprising a voltage booster and a voltage regulator supplied by the voltage booster, the voltage booster comprising, in combination, a datum line connecting one side of the source to one side of the regulator, an inductive reactor and switch means connected in series across the source, a storage capacitor connected across the output to the regulator, a unidirectional current device connecting a first junction between the reactor and switch means to the storage capacitor and output, and oscillator means effective to open and close the switch means, characterized by oscillator means including mixer means for developing a control potential responsive to both the output and input potentials; a first resistor connected to the output and a first transistor connecting the datum line to the first resistor through the emitter-collector circuit of the transistor; a second resistor connected to the datum line and a second transistor connecting the said junction to the second resistor through the collector-emitter circuit of the second transistor; the base of the second transistor being connected to the collector of the first transistor; a Zener diode connecting the mixer means to a second junction connected to the base of the first transistor; a resistor and a feedback capacitor connected in series between the first and second junctions; and a resistor connected between the second junction and the emitter of the second transistor; the second transistor being effective to hold the switch means closed when conducting, the said transistors operating as a relaxation oscillator of variable duty cycle responsive to voltage booster input and output potentials to cycle the switch means between open and closed conditions.

Claim 8

A circuit for supplying a substantially constant potential D.C. output from a D.C. source with potential varying over a range from greater than to smaller than that of the output, the circuit comprising a voltage booster and a voltage regulator supplied by the voltage booster, the voltage booster comprising, in combination, a datum line connecting one side of the source to one side of the regulator, an inductive reactor and switch means connected in series across the source, a storage capacitor connected across the output to the regulator, a unidirectional current device connecting a first junction between the reactor and switch means to the storage capacitor and output, and oscillator means effective to open and close the switch means, characterized by oscillator means including mixer means for developing a control potential responsive to both the output and input potentials; a first resistor connected to the output and a first transistor connecting the datum line to the first resistor through the emitter-collector circuit of the transistor; a second resistor connected to the datum line and a second transistor connecting the said junction to the second resistor through the collector-emitter circuit of the second transistor; the base of the second transistor being connected to the collector of the first transistor; a Zener diode connecting the mixer means to a second junction connected to the base of the first transistor; a resistor and a feedback capacitor connected in series between the first and second junctions; and a resistor connected between the second junction and the emitter of the second transistor; the second transistor being effective to hold the switch means closed when conducting, the said transistors operating as a relaxation oscillator of variable duty cycle responsive to voltage booster input and output potentials to cycle the switch means between open and closed conditions.