Transistor impedance converter and oscillator circuits

Claim 2

A transistorized circuit comprising a pair of transistors of opposite conductivity types, the base electrode of the first transistor connected to the collector of the second transistor, a collector of the first transistor connected to the base of the second transistor, a first resistor, a first capacitor connected in parallel with said first resistor and one side of the parallel combination connected to the base of said first transistor, a voltage source connected to the other side of said parallel combination and to the emitter of said second transistor, and a current source connected between the emitter of said first transistor and the other side of said parallel combination.

Claim 3

A transistorized circuit according to claim 1 comprising a second capacitor connected in parallel with said current source.

Claim 4

A transistorized circuit according to claim 2 comprising a second resistor connected between said voltage source and said emitter of said second transistor.

Claim 5

A transistorized circuit according to claim 2 comprising a pair of input terminals with one connected to the junction point between said voltage source and said parallel combination, and a second resistor connected between said second input terminal and said emitter of said first transistor.

Claim 6

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit constituted of a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected to the equivalent base terminal of said two-transistor circuit, a first external terminal connected to the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected to the other end of said impedance circuit, and means for imparting an operating power source to said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, thereby obtaining an impedance substantially equal to the sum of a negative resistance -( Alpha O-1) r2 and an impedance based on an inductance ( Alpha 0-1)Ccr22 between said first and second terminals without using any inductor.

Claim 7

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit constituted of a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected to the equivalent base terminal of said two-transistor circuit, a first external terminal connected to the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected to the other end of said impedance circuit, and means for imparting an operating power source to said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, thereby obtaining an impedance substantially equal to the sum of a negative resistance -( Alpha O-1) r2 and an impedance based on an inductance ( Alpha 0-1)Ccr22 between said first and second terminals without using any inductor.

Claim 8

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit constituted of a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected with the equivalent base terminal of said two-transistor circuit, a first external terminal connected with the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected with the other end of said impedance circuit, and means for imparting an operating power source to said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, thereby obtaining an impedance based on a negative capacitance between said first nd second terminals.

Claim 9

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit constituted of a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected with the equivalent base terminal of said two-transistor circuit, a first external terminal connected with the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected with the other end of said impedance circuit, and means for imparting an operating power source to said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, thereby obtaining an impedance based on a negative capacitance between said first nd second terminals.

Claim 10

An oscillator circuit comprising the transistor impedance converter set forth in claim 6, and a capacitor having a capacitance Cf connected between said first nd second external terminals, thereby producing oscillation at a frequency represented substAntially by without using any inductor.

Claim 11

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit comprising a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected to the equivalent base terminal of said two-transistor circuit, a first external terminal connected with the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected to the other end of said impedance circuit, means for imparting an operating power source to said two transistor circuit, and a resistor having a resistance r3 inserted in the line between said first external terminal and said equivalent emitter terminal of said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, and said resistance r3 of said resistor being so selected substantially as to meet a relationship of r3 ( Alpha 0-1)r2, thereby obtaining an impedance based on an inductance ( Alpha 0-1)Ccr22 between said first and second external terminals without using any inductor.

Claim 12

A transistor impedance converter comprising a two-transistor circuit consisting of first and second transistors of opposite types of conductivity equivalent to a single transistor having a common base current amplification factor Alpha 0 greater than 1, an impedance circuit comprising a parallel circuit of a resistance element having a resistance r2 and a capacitance element having a capacitance Cc, one end of said impedance circuit being connected to the equivalent base terminal of said two-transistor circuit, a first external terminal connected with the equivalent emitter terminal of said two-transistor circuit, a second external terminal connected to the other end of said impedance circuit, means for imparting an operating power source to said two transistor circuit, and a resistor having a resistance r3 inserted in the line between said first external terminal and said equivalent emitter terminal of said two-transistor circuit, said resistance r2 and said capacitance Cc being so selected as to meet a relationship of ( omega Ccr2)2<<1, omega being an operational angular frequency, and said resistance r3 of said resistor being so selected substantially as to meet a relationship of r3 ( Alpha 0-1)r2, thereby obtaining an impedance based on an inductance ( Alpha 0-1)Ccr22 between said first and second external terminals without using any inductor.