Integrated circuit biasing arrangements

Claim 2

An electrical circuit for providing control voltages comprising: first and second transistors each having an emitter electrode, a base electrode and a collector electrode; circuit means coupled to the emitter, base and collector electrodes of said first transistor for connecting said first transistor in a degenerated common emitter configuration, said means including a first resistor and a number of semiconductor diodes serially coupled therewith to the emitter electrode of said first transistor and a second resistor substantially (N+1) times the value of said first resistor and a plurality of semiconductor diodes, (N+1) times said number of diodes, serially coupled to the collector electrode of said first transistor, where N is a positive integer equal to or greater than zero; circuit means coupled to the emitter, base and collector electrodes of said second transistor for connecting said second transistor in a common collector configuration; means including N additional semiconductor diode elements and the base emitter circuit of said second transistor for coupling the collector electrode of said first transistor in feedback relation to the base electrode of said first transistor; means for coupling a source of energizing potential to said transistors; and means coupled to said base of said first transistor for deriving an output voltage, said circuit means, including said number of diodes and said plurality of diodes, coupled to said first transistor permitting development of said output voltage at a relatively low output impedance.

Claim 3

An electrical circuit as defined in claim 1 in which said last mentioned means is arranged to provide, with respect to the end of the series coupling including said first resistor and associated diodes which is remote from the emitter electrode of said first transistor, an output voltage substantially equal to 1/N+2 times the voltage of the energizing potential source.

Claim 4

An electrical circuit as defined in claim 1 in which said last mEntioned means is arranged to provide, with respect to the end of the series coupling including said second resistor and associated diodes which is remote from the collector electrode of said first transistor, an output voltage substantially equal to N+1/N+2 times the voltage of the energizing potential source.

Claim 5

An electrical circuit for providing control voltages comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential; a first diode; a first resistor serially coupled with said first diode connected between the collector electrode of said first transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal, with said second resistor being substantially of the same resistance value as said first resistor; a direct current connection from the collector electrode of said second transistor to said first terminal; a direct current connection from the collector electrode of said first transistor to the base electrode of said second transistor; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage between the emitter electrode of said second transistor and one of said first and second terminals.

Claim 6

An electrical circuit for providing control voltages comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential; a first diode; a first resistor serially coupled with said first diode connected between the collector electrode of said first transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal, with said second resistor being substantially of the same resistance value as said first resistor; a direct current connection from the collector electrode of said second transistor to said first terminal; a direct current connection from the collector electrode of said first transistor to the base electrode of said second transistor; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage between the emitter electrode of said second transistor and one of said first and second terminals.

Claim 7

An electrical circuit for providing control voltages comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential; a plurality of N semiconductor diode elements connected in series with the base-emitter junction of said second transistor to the collector electrode of said first transistor, with N representing a positive integer of zero or more; a plurality of series connected diodes N+1; a first resistor serially coupled with said N+1 diodes connected between the collector electrode of said first transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal and being substantially 1/N+1 times the resistance value of said first resistor; a direct current connection from the collector electrode of said second transistor to said first terminal; a third resistor connected between the emitter electrode of said second transistor and said second terminal; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage between the emitter electrode of said second transistor and said second terminal 1/N+2 times the voltage of said energizing potential source, said N+1 diodes and said second diode permitting development of said output voltage at a relatively low output impedance.

Claim 8

An electrical circuit for providing control voltages comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential; a plurality of N semiconductor diode elements connected in series with the base-emitter junction of said second transistor to the collector electrode of said first transistor, with N representing a positive integer of zero or more; a plurality of series connected diodes N+1; a first resistor serially coupled with said N+1 diodes connected between the collector electrode of said first transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal and being substantially 1/N+1 times the resistance value of said first resistor; a direct current connection from the collector electrode of said second transistor to said first terminal; a third resistor connected between the emitter electrode of said second transistor and said second terminal; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage between the emitter electrode of said second transistor and said second terminal 1/N+2 times the voltage of said energizing potential source, said N+1 diodes and said second diode permitting development of said output voltage at a relatively low output impedance.

Claim 9

An electrical circuit as defined in claim 2 wherein: each of said N semiconductor diode elements comprises a base-emitter junction of a transistor, each of said last-named transistors further comprising a collector electrode direct current connected to said first terminal.

Claim 10

A biasing circuit for establishing and maintaining operating characteristics of a semiconductor amplifier comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential: a first diode; a first resistor serially coupled with said first diode connected between the collector electrode of said fIrst transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal, and being of substantially the same resistance value as said first resistor; a direct current connection from the collector electrode of said second transistor to and said second terminal; a third resistor connected between the emitter electrode of said second transistor and said second terminal; a direct current connection from the collector electrode of said first transistor to the base electrode of said second transistor; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage at low impedance equal to one-half the voltage of said energizing potential source between the emitter electrode of said second transistor and said second terminal to bias said semiconductor amplifier for said operating characteristics, said first and second diodes permitting development of said output voltage at said low impedance.

Claim 11

A biasing circuit for establishing and maintaining operating characteristics of a semiconductor amplifier comprising: first and second transistors, each having an emitter electrode, a base electrode and a collector electrode; first and second terminals adapted to be connected to a source of energizing potential: a first diode; a first resistor serially coupled with said first diode connected between the collector electrode of said fIrst transistor and said first terminal; a second diode; a second resistor serially coupled with said second diode connected between the emitter electrode of said first transistor and said second terminal, and being of substantially the same resistance value as said first resistor; a direct current connection from the collector electrode of said second transistor to and said second terminal; a third resistor connected between the emitter electrode of said second transistor and said second terminal; a direct current connection from the collector electrode of said first transistor to the base electrode of said second transistor; a direct current connection from the emitter electrode of said second transistor to the base electrode of said first transistor; and means for deriving an output voltage at low impedance equal to one-half the voltage of said energizing potential source between the emitter electrode of said second transistor and said second terminal to bias said semiconductor amplifier for said operating characteristics, said first and second diodes permitting development of said output voltage at said low impedance.

Claim 12

A biasing circuit as defined in claim 6 wherein said first and second transistors, said plurality of transistors N, said plurality of diodes N+1, said first, second and third resistors, said second diode and said direct current connections are all disposed in a single integrated circuit.

Claim 13

An electrical circuit as defined in claim 1 wherein: each of said additional semiconductor diode elements comprises a base-emitter junction of a transistor, each of said last-named transistors further comprising a collector electrode coupled to the collector electrode of said second transistor.

Claim 14

An electrical circuit as defined in claim 9 wherein: the emitter electrode of said second transistor is directly connected to the base electrode of said first transistor and said output voltage is derived from the emitter electrode of said second transistor.