BATTERY TESTER
First Claim
1. A battery tester for determining a remaining level of charge of a battery mounted within a separate electronic device having an audio jack, comprising a circuit including a high impedance input amplifier and a plug having a contact that is electrically coupled to an input of said high impedance input amplifier, said plug being removably insertable within the audio jack such that said contact of said plug electrically connects the battery to said input of said high impedance input amplifier, said high impedance input amplifier having an output that produces a signal proportional to the remaining level of charge of the battery, whereby the remaining level of charge of the battery is obtainable by said battery tester without having to remove the battery from the electronic device.
1 Assignment
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Accused Products
Abstract
A battery tester determines a remaining level of charge of a battery mounted within a separate electronic device having an audio jack. The battery tester includes a plug and a circuit having a high impedance input amplifier. At least one electrical contact of the plug is electrically coupled to an input of the high impedance input amplifier. The plug is removably insertable within the audio jack such that the battery of the separate electronic device is electrically connected to the input of the high impedance input amplifier. When electrically coupled to the battery, an output of the high impedance input amplifier provides a signal proportional to the remaining level of charge of the battery, whereby the remaining level of charge of the battery is obtainable by the battery tester without having to remove the battery from the electronic device.
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Citations
16 Claims
- 1. A battery tester for determining a remaining level of charge of a battery mounted within a separate electronic device having an audio jack, comprising a circuit including a high impedance input amplifier and a plug having a contact that is electrically coupled to an input of said high impedance input amplifier, said plug being removably insertable within the audio jack such that said contact of said plug electrically connects the battery to said input of said high impedance input amplifier, said high impedance input amplifier having an output that produces a signal proportional to the remaining level of charge of the battery, whereby the remaining level of charge of the battery is obtainable by said battery tester without having to remove the battery from the electronic device.
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8. A combination electronic device having an audio output jack, and a battery tester for use in testing the charge level of an internal battery mounted within said electronic device;
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wherein the audio output jack has a first contact connected to a terminal of the internal battery the other terminal of which is connected to deliver operating power to a tone control circuit contained within said electronic device, wherein the audio output jack has a second contact connected to an output of said tone control circuit, and a third contact connected to the tone control circuit and connectible to complete a circuit for delivering operating power from the first contact to the tone control circuit when the first contact is connected to the third contact by a conductive part of an audio plug inserted into said jack; and wherein the battery tester comprises a plug insertable into said audio output jack, said plug having two conductors isolated from each other and connectible respectively to said first and third contacts, and a battery charge measuring device connected to said first and third contacts. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of deterring the remaining level of charge of at least one battery contained within a battery compartment of an electric musical instrument, comprising the steps of:
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inserting a plug of a battery tester into an audio jack of the instrument to electrically couple the at least one battery to the battery tester without removing the batteries from within the instrument; and observing an indication of the remaining level of charge produced by the battery tester in response to said inserting step. - View Dependent Claims (15, 16)
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Specification