Diode bridge type electronic switch

Claim 2

A diode bridge type electronic switching circuit having a diode bridge type switch and control means for on-off controlling said diode bridge type switch, wherein said diode bridge type switch comprises diodes connected in a bridge configuration with a first and second control terminal at a first pair of opposed connection points of said diodes and input and output terminals connected at a second pair of opposed connection points of said diodes, said diode bridge type switch having its conductive direction from said first to said second control terminals, and wherein said control means comprises: first and third resistors connected to said first and second control terminals, respectively; second and fourth resistors connected respectively in series to said first and third resistors; means for supplying a first control voltage to said first control terminal through said second and first resistors; means for supplying to said second control terminal through said fourth and third resistors a second control voltage having a polarity opposite to that of said first control voltage, said first and second control voltages being forwardly directed to said diode bridge type switch with respect to the forward direction thereof; a switch controlling transistor connected in parallel between the connection point of said first and second resistors and the connection point of said third and fourth resistors; means for applying an on-off control signal to the base of said transistor so as to render said transistor in its on and off states depending upon the on-off control signal, so that said transistor forms a parallel substantially shorting circuit between said first and second contRol terminals when it its on state; a first bias means including a first bias resistor connected to said first control terminal for supplying a first bias voltage through said first bias resistor to said first control terminal; and a second bias means including a second bias resistor connected to said second control terminal for supplying to said second control terminal through said second bias resistor a second bias voltage having a polarity opposite to that of said bias voltage but being of the same polarity as that of the first control voltage, said first and second bias resistors having relatively large resistances with respect to those of the series resistor circuits of said first and third resistors and of said second and fourth resistors, whereby an input signal to be controlled which is applied to said input terminal is on-off controlled and an on-off controlled output signal is obtained from said output terminal.

Claim 3

A diode bridge type electronic switching circuit comprising: a diode bridge type switch including diodes connected in a bridge configuration which is provided with first and second control terminals, input and output terminals and which has its forward direction from said first to said second control terminals; a first bias means including a first resistor connected to said first control terminal, a second resistor connected in series with said first resistor and a first power source connected to said second resistor for applying a first bias voltage to said first control terminal; a second bias means including a third resistor connected to said second control terminal, a fourth resistor connected in series with said third resistor and a second power source connected to said fourth resistor for applying a second bias voltage to said second control terminal, said first and second bias voltages having polarities opposite to each other; a switch controlling transistor having an emitter electrode and a collector electrode, and being connected at one of said electrodes to the connection point between said first and second resistors and at the other of said electrodes at the connection point between said third and fourth resistors; means for applying an on-off control signal to the base of said transistor so as to turn said transistor on and off, so that said transistor forms 2 parallel shorting circuit between said connection points when in its on state; a third bias means including a fifth resistor connected to said first control terminal and a third power source connected to said fifth resistor for applying a third bias voltage to said first control terminal; and a fourth bias means including a sixth resistor connected to said second control terminal and a fourth power source connected to said sixth resistor for applying a fourth bias voltage to said second control terminal; said third bias voltage having a polarity opposite to the polarities of said fourth and first bias voltages but being of the same polarity as the polarity of said second bias voltage, said fifth and sixth resistor having, respectively, a resistance relatively larger than those of the series resistors circuits of said first and second resistors and of said third and fourth resistors, and said first, second, third and fourth bias voltages providing a power supply for said switch when said transistor is turned off, while said third and fourth bias voltages provide a blocking potential to said diode bridge type switch when said transistor is turned on, whereby an input signal to be controlled which is applied to said input terminal in on-off controlled and an on-off controlled output signal is obtained from the output terminal.

Claim 4

A diode bridge type electronic switching circuit comprising: a diode bridge type switch including diodes connected in a bridge configuration which is provided with first and second control terminals, input and output terminals and which has its forward direction from said first to said second control terminals; a first bias means including a first resistor connected to said first control terminal, a second resistor connected in series with said first resistor and a first power source connected to said second resistor for applying a first bias voltage to said first control terminal; a second bias means including a third resistor connected to said second control terminal, a fourth resistor connected in series with said third resistor and a second power source connected to said fourth resistor for applying a second bias voltage to said second control terminal, said first and second bias voltages having polarities opposite to each other; a switch controlling transistor having an emitter electrode and a collector electrode, and being connected at one of said electrodes to the connection point between said first and second resistors and at the other of said electrodes at the connection point between said third and fourth resistors; means for applying an on-off control signal to the base of said transistor so as to turn said transistor on and off, so that said transistor forms 2 parallel shorting circuit between said connection points when in its on state; a third bias means including a fifth resistor connected to said first control terminal and a third power source connected to said fifth resistor for applying a third bias voltage to said first control terminal; and a fourth bias means including a sixth resistor connected to said second control terminal and a fourth power source connected to said sixth resistor for applying a fourth bias voltage to said second control terminal; said third bias voltage having a polarity opposite to the polarities of said fourth and first bias voltages but being of the same polarity as the polarity of said second bias voltage, said fifth and sixth resistor having, respectively, a resistance relatively larger than those of the series resistors circuits of said first and second resistors and of said third and fourth resistors, and said first, second, third and fourth bias voltages providing a power supply for said switch when said transistor is turned off, while said third and fourth bias voltages provide a blocking potential to said diode bridge type switch when said transistor is turned on, whereby an input signal to be controlled which is applied to said input terminal in on-off controlled and an on-off controlled output signal is obtained from the output terminal.

Claim 5

A diode bridge type electronic switch circuit comprising: a diode bridge type switch having first and second control terminals, an input terminal for receiving a signal to be controlled and an output terminal for deriving a controlled signal; a switch controlling transistor acting as an electronic sWitch provided with its emitter and collector connected respectively with end portion of first and second resistors which are connected with said first and second control terminals and being switched on and off by a control signal applied to the base thereof; means for applying a first bias voltage through a third resistor to a connection point of said electronic switch and the end portion said first resistor connected with said first control terminal; means for applying a second bias voltage through a fourth resistor to a connection point of said electronic switch and the end portion of said second resistor connected with said second controlled terminal, said second bias voltage having a polarity opposite to that of said first bias voltage; means for applying a third bias voltage to said first control terminal through a fifth resistor and having a polarity opposite to that of said first bias voltage; and means for applying a fourth bias voltage to said second control terminal through a sixth resistor and having a polarity opposite to that of said second bias voltage.

Claim 6

A diode bridge type electronic switch circuit comprising: a diode bridge type switch having first and second control terminals, an input terminal for receiving a signal to be controlled and an output terminal for deriving a controlled signal; a switch controlling transistor acting as an electronic sWitch provided with its emitter and collector connected respectively with end portion of first and second resistors which are connected with said first and second control terminals and being switched on and off by a control signal applied to the base thereof; means for applying a first bias voltage through a third resistor to a connection point of said electronic switch and the end portion said first resistor connected with said first control terminal; means for applying a second bias voltage through a fourth resistor to a connection point of said electronic switch and the end portion of said second resistor connected with said second controlled terminal, said second bias voltage having a polarity opposite to that of said first bias voltage; means for applying a third bias voltage to said first control terminal through a fifth resistor and having a polarity opposite to that of said first bias voltage; and means for applying a fourth bias voltage to said second control terminal through a sixth resistor and having a polarity opposite to that of said second bias voltage.

Claim 7

A diode bridge type electronic switching circuit comprising: a diode bridge type switch having first and second control terminals, an input terminal for receiving an input signal to be controlled and an output terminal; a single switch controlling transistor with its emitter collector connected in parallel with said first and second control terminals of said diode bridge type switch; means for applying an on-off control signal to the base of said transistor so as to render said transistor in on and off states, so that said transistor forms a parallel shorting circuit between said first and second control terminals when in its on state; means including a first resistor connected at one end thereof to said first control terminal for applying a first bias voltage through said first resistor to said first control terminal; and means including a second resistor connected at one end thereof to said second control terminal for applying a second bias voltage through said second resistor to the said second control terminal; said first and second bias voltage having polarities opposite to each other and being applied as a power supply for said diode bridge type switch is on-off controlled in response to on-off states of said switch controlling transistor, respectively, whereby an input signal applied to said input terminal is on-off controlled and an on-off controlled output signal is obtained from said output terminal.

Claim 8

A diode bridge type electronic switching circuit comprising: a diode bridge type switch having first and second control terminals, an input terminal for receiving an input signal to be controlled and an output terminal; a single switch controlling transistor with its emitter collector connected in parallel with said first and second control terminals of said diode bridge type switch; means for applying an on-off control signal to the base of said transistor so as to render said transistor in on and off states, so that said transistor forms a parallel shorting circuit between said first and second control terminals when in its on state; means including a first resistor connected at one end thereof to said first control terminal for applying a first bias voltage through said first resistor to said first control terminal; and means including a second resistor connected at one end thereof to said second control terminal for applying a second bias voltage through said second resistor to the said second control terminal; said first and second bias voltage having polarities opposite to each other and being applied as a power supply for said diode bridge type switch is on-off controlled in response to on-off states of said switch controlling transistor, respectively, whereby an input signal applied to said input terminal is on-off controlled and an on-off controlled output signal is obtained from said output terminal.

Claim 9

A diode bridge type electronic switching circuit according to claim 4, wherein said first and second bias voltages are so directed as to provide a forward bias voltage between said first and second control terminals of said diode bridge type switch.

Claim 10

A diode bridge type electronic switching circuit according to claim 4, further comprising a third resistor connected at one end thereof to said first control terminal of said diode bridge type switch and at the other end thereof to said one end of said first resistor, and a fourth resistor connected at one end thereof to said second control terminal of said diode bridge type switch and at the other end thereof to said one end of said second resistor, so that said switch controlling transistor is connected between the connection point of said first and third resistors and the connection point of said second and fourth resistors, whereby said diode bridge type switch is blocked so as to be turned off through said third and fourth resistors when said transistor is turned on.

Claim 11

A diode bridge type electronic switching circuit having a diode bridge type switch and control means for on-off switch controlling said diode bridge type switch, wherein said diode bridge type switch comprises diodes connected in a bridge configuration and has first and second control terminals at a first pair of opposed connection points of said diodes and input and output terminals at a second pair of opposed connection poinTs of said diodes, said diode bridge type switch having its conductive direction from said first to said second control terminals, and wherein said control means comprises: a single switch controlling transistor with its emitter and collector connected in parallel with said first and second control terminals of said diode bridge type switch; a first resistor connected at one end thereof to said first control terminal; a second resistor connected at one end thereof to said second control terminal; means for supplying between said first and second control terminals through said first and second resistors, a control voltage which is directed in a forward direction with respect to the forward direction of said diode bridge type switch; and means for applying an on-off control signal to the base of said transistor, so as to render said transistor in its on and off states depending on the on-off control signal, whereby said transistor constitutes a parallel shorting circuit between said first and second control terminals when in its on state, so that an input signal to be controlled which is applied to said input terminal is on-off controlled and an on-off controlled output signal is obtained from said output terminal.

Claim 12

A diode bridge type electronic switching circuit having a diode bridge type switch and control means for on-off switch controlling said diode bridge type switch, wherein said diode bridge type switch comprises diodes connected in a bridge configuration and has first and second control terminals at a first pair of opposed connection points of said diodes and input and output terminals at a second pair of opposed connection poinTs of said diodes, said diode bridge type switch having its conductive direction from said first to said second control terminals, and wherein said control means comprises: a single switch controlling transistor with its emitter and collector connected in parallel with said first and second control terminals of said diode bridge type switch; a first resistor connected at one end thereof to said first control terminal; a second resistor connected at one end thereof to said second control terminal; means for supplying between said first and second control terminals through said first and second resistors, a control voltage which is directed in a forward direction with respect to the forward direction of said diode bridge type switch; and means for applying an on-off control signal to the base of said transistor, so as to render said transistor in its on and off states depending on the on-off control signal, whereby said transistor constitutes a parallel shorting circuit between said first and second control terminals when in its on state, so that an input signal to be controlled which is applied to said input terminal is on-off controlled and an on-off controlled output signal is obtained from said output terminal.

Claim 13

A diode bridge type electronic switching circuit according to claim 7, wherein said transistor is a PNP type transistor whose collector and emitter are connected to said first and second control terminals, respectively.

Claim 14

A diode bridge type electronic switching circuit according to claim 7, wherein said transistor is an NPN type transistor whose collector and emitter are connected to the second and first control terminals, respectively.

Claim 15

A diode bridge type electronic switching circuit according to claim 7, wherein said control voltage supplying means include a first supply means for supplying a first voltage to said first control terminal and a second supply means for supplying a second voltage having a polarity opposite to the polarity of said first voltage to said second control terminal.