Circuit for low power-low energy source
First Claim
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1. A circuit for DC to DC conversion of the voltage level of a low voltage power source, comprising:
- a. an oscillator circuit having an input for connection to said power source and an output for providing a relatively high amplitude oscillator signal, said oscillator circuit having a low starting resistance input path connected across said source, said path containing an active circuit comprised of at least two FETs, said active circuit being characterized by having a high impedance state and a low impedance state; and
b. a rectifier circuit connected to said oscillator circuit output, for providing a rectified voltage signal from said oscillator signal.
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Abstract
A DC to DC converter with voltage regulator for converting a low level voltage source to a higher level DC, comprising an oscillator circuit with a low resistance starting current path, a rectifier circuit for rectifying the oscillator output, and a regulator for providing a regulated DC output voltage of predetermined level. The oscillator embodies one or more FET devices connected to provide an extremely low DC startup resistance as well as a low cutoff voltage characteristic. With this configuration, the low startup current from the voltage source can initiate switching so that oscillation can occur.
25 Citations
22 Claims
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1. A circuit for DC to DC conversion of the voltage level of a low voltage power source, comprising:
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a. an oscillator circuit having an input for connection to said power source and an output for providing a relatively high amplitude oscillator signal, said oscillator circuit having a low starting resistance input path connected across said source, said path containing an active circuit comprised of at least two FETs, said active circuit being characterized by having a high impedance state and a low impedance state; and b. a rectifier circuit connected to said oscillator circuit output, for providing a rectified voltage signal from said oscillator signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A circuit for conversion of the voltage level of a low voltage power source and for providing a regulated output, comprising:
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a. an oscillator circuit having an input for connection to said power source and an output for providing a relatively high amplitude oscillator signal, said oscillator circuit having a low starting resistance input path connected across said source, said path containing an active device, said device characterized by having a high impedance state and a low impedance state; b. a rectifier circuit connected to said oscillator output, for providing a rectified voltage signal from said oscillator signal; c. a regulator circuit with an output terminal, said regulator circuit connected to said rectifier circuit, for providing at said output terminal a regulated output from said rectified voltage signal, said regulator circuit comprising a regulating element between said rectifier circuit and said output terminal, and a regulating control path between said output terminal and said regulating element, said control path comprising an OTA, first input means for connecting to a first input terminal of said OTA a signal representative of said regulator output signal, said reference generator means being connected to a second input of said OTA, the output of said OTA being connected to said regulating element whereby said OTA acts to control said regulating element as a function of said output relative to said reference, said reference means comprising a current generator connected to said output terminal, the output of said current generator being connected both to said second OTA input terminal and into the OTA bias terminal, said current generator comprising an FET in combination with an adjustable resistor, whereby a regulated signal is provided at said regulator output terminal. - View Dependent Claims (9, 10, 11, 12)
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14. A circuit for conversion of the voltage level of a low voltage power source and for providing a regulated output, comprising:
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a. an oscillator circuit having an input for connection to said power source and an output for providing a relatively high amplitude oscillator signal, said oscillator circuit having a low starting resistance input path connected across said source, said path containing an active circuit comprised of at least two FETs, said active circuit being characterized by having a high impedance state and a low impedance state; b. a rectifier circuit connected to said oscillator output, for providing a rectified voltage signal from said oscillator signal; c. a regulator circuit with an output terminal, said regulator circuit connected to said rectifier circuit, for providing at said output terminal a regulated output from said rectified voltage signal, said regulator circuit comprising a regulating element between said rectifier circuit and said output terminal, and a regulating control path between said output terminal and said regulating element, said control path comprising an OTA, first input means for connecting to a first input terminal of said OTA a signal representative of said regulator output signal, reference generator means for generating a reference signal, said reference generator means being connected to a second input of said OTA, the output of said OTA being connected to said regulating element whereby said OTA acts to control said regulating element as a function of said output relative to said reference, whereby a regulated signal is provided at said regulator output terminal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification