Polarity adaptive power source apparatus
First Claim
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1. A device comprising:
- a battery receptacle comprising a first contact and a second contact configured to electrically couple to a battery in either a first orientation or a second orientation with respect to polarity of the battery;
a bridge circuit connected to the first contact and the second contact and having a positive output and a negative output, the bridge circuit comprising;
four metal oxide semiconductor field-effect transistors (MOSFETs) Q1, Q2, Q3, and Q4, wherein;
the Q1 and the Q4 comprise N-type MOSFETs each having a source, gate, and drain;
the Q2 and the Q3 comprise P-type MOSFETs each having a source, gate, and drain;
the first contact is connected to the drains of the Q1 and the Q3 and the gates of the Q4 and the Q2;
the second contact is connected to the drains of the Q4 and the Q2 and the gates of the Q1 and the Q3;
the sources of the Q1 and the Q4 are connected to the negative output; and
the sources of the Q2 and the Q3 are connected to the positive output.
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Abstract
Described are devices for automatically adapting electrical polarity from a power source to a specified output polarity for use by an electrical load. In one implementation, power adaptation circuitry comprising one or more bridge circuits accept electrical power of unspecified polarity and output specified polarity. The bridge circuit may comprise a plurality of field-effect transistors (FETs) configured such that a particular subset of the FETs are energized to conduct electric current to the outputs when a particular polarity is applied at inputs.
16 Citations
20 Claims
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1. A device comprising:
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a battery receptacle comprising a first contact and a second contact configured to electrically couple to a battery in either a first orientation or a second orientation with respect to polarity of the battery; a bridge circuit connected to the first contact and the second contact and having a positive output and a negative output, the bridge circuit comprising; four metal oxide semiconductor field-effect transistors (MOSFETs) Q1, Q2, Q3, and Q4, wherein; the Q1 and the Q4 comprise N-type MOSFETs each having a source, gate, and drain; the Q2 and the Q3 comprise P-type MOSFETs each having a source, gate, and drain; the first contact is connected to the drains of the Q1 and the Q3 and the gates of the Q4 and the Q2; the second contact is connected to the drains of the Q4 and the Q2 and the gates of the Q1 and the Q3; the sources of the Q1 and the Q4 are connected to the negative output; and the sources of the Q2 and the Q3 are connected to the positive output. - View Dependent Claims (2, 3, 4)
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5. A device comprising:
a bridge circuit having a first input, a second input, a first output, and a second output, the bridge circuit comprising; a first field-effect transistor (FETs), a second FET, a third FET, and a fourth FET fourth FET;
wherein;the first FET and the fourth FET comprise FETs each having a source, a gate, and a drain, wherein the first FET and the fourth FET comprise N-type FETs; the second FET and the third FET comprise FETs each having a source, a gate, and a drain, wherein the second FET and the third FET comprise P-type FETs; the first input is connected to; the drains of the first FET and the third FET, and the gates of the second FET and the fourth FET; the second input is connected to; the drains of the second FET and the fourth FET, and the gates of the first FET and the third FET; the sources of the first FET and the fourth FET are connected to the second output; and the sources of the second FET and the third FET are connected to the first output. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A device comprising:
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a first field effect transistor (FET) and a second FET, each having a source, gate, and a drain, wherein the first FET and the second FET comprise N-type FETs; a third FET and a fourth FET, each having a source, gate, and a drain, wherein the third FET and the fourth FET comprise P-type FETs; a first input connected to the drains of the first FET and the fourth FET and the gates of the second FET and the third FET; and a second input connected to the drains of the second FET and the third FET and the gates of the first FET and the fourth FET; wherein; the sources of the first FET and the second FET are connected to a negative output; and the sources of the third FET and the fourth FET are connected to a positive output. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification