Power supply settable bi-stable circuit

Claim 2

A circuit for setting a bi-stable circuit having at least one branch in a predetermined state when power is applied to the bistable circuit from a source of power comprising: resistor means coupled to said source of power; a first field effect device having at least a gate and two regions, said gate and one region being coupled to said resistor means; a second field effect device coupled into said branch of said bi-stable circuit and having its gate coupled to the other region of said first field effect device; whereby when power from said source is applied to said bi-stable circuit said bi-stable circuit is set in a predetermined state.

Claim 3

The circuit defined in claim 1 wherein said resistor means comprises a third field effect device with its gate and one region coupled to said source of power and its other region coupled to said one region and gate of said first field effect device.

Claim 4

The circuit defined in claim 2 including a fourth field effect device having its gate coupled to said source of power, one of the regons coupled to the said other region of said first field effect device and its other region coupled to ground.

Claim 5

The circuit defined in claim 3 wherein said first, second, third and fourth field effect devices include silicon gates.

Claim 6

A bi-stable circuit settable in a predetermined state by application of power from a source of power to the circuit comprising: a flip-flop circuit having at least two branches, one of which includes a first field effect device having a gate and two regions, said two regions being coupled in series in said one branch; said flip-flop circuit being coupled to said source of power; a second field effect device having a gate and two regions, one region and said gate being coupled to said source of power; a third field effect device having a gate and two regions; said gate and one of said regions being coupled to said other region of said second field effect device and said other region being coupled to the gate of said first field effect device; whereby by the application of power through said source of power to said bi-stable circuit current will flow in a predetermined branch of said circuit.

Claim 7

A bi-stable circuit settable in a predetermined state by application of power from a source of power to the circuit comprising: a flip-flop circuit having at least two branches, one of which includes a first field effect device having a gate and two regions, said two regions being coupled in series in said one branch; said flip-flop circuit being coupled to said source of power; a second field effect device having a gate and two regions, one region and said gate being coupled to said source of power; a third field effect device having a gate and two regions; said gate and one of said regions being coupled to said other region of said second field effect device and said other region being coupled to the gate of said first field effect device; whereby by the application of power through said source of power to said bi-stable circuit current will flow in a predetermined branch of said circuit.

Claim 8

The circuit defined in claim 5 including a fourth field effect device having a gate and two regions, said gate being coupled to said source of power, one of said regions being coupled to said gate of said first field effect device and the other rEgion of said field effect device being coupled to ground.

Claim 9

A setting circuit for causing current to initially flow in a predetermined branch of a bi-stable circuit having two branches when the bi-stable circuit is coupled to a source of potential comprising: switching means coupled into one branch of said bi-stable circuit, said switching means including a control lead; a first field effect transistor having its gate and its source coupled to said source of potential; a second field effect transistor having its gate and its source coupled to the drain of said first field effect transistor and its drain coupled to the control lead of said switching means; whereby when said setting circuit and bi-stable circuit are coupled to said source of potential, current will initially flow in said other branch of said bi-stable circuit.

Claim 10

A setting circuit for causing current to initially flow in a predetermined branch of a bi-stable circuit having two branches when the bi-stable circuit is coupled to a source of potential comprising: switching means coupled into one branch of said bi-stable circuit, said switching means including a control lead; a first field effect transistor having its gate and its source coupled to said source of potential; a second field effect transistor having its gate and its source coupled to the drain of said first field effect transistor and its drain coupled to the control lead of said switching means; whereby when said setting circuit and bi-stable circuit are coupled to said source of potential, current will initially flow in said other branch of said bi-stable circuit.

Claim 11

The circuit defined in claim 7 wherein said switching means includes a third a third field effect transistor having its source and drain coupled in series in said one branch of said bi-stable circuit and its gate coupled to the drain of said second field effect transistor.

Claim 12

The circuit defined in claim 8 including discharge means for discharging the gate of said third field effect transistor when said source of potential is removed from said setting circuit.

Claim 13

The circuit defined in claim 9 wherein said discharge means comprises a fourth field effect transistor having its gate coupled to said source of potential, its source coupled to said gate of said third field effect transistor and its drain coupled to ground.