US3710260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state receiving multicoupler
Assignee: Delta Electronics Inc
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Filing: 1971-02-16
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Granted: 1973-01-09
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Expires: 1991-02-16
Abstract
Abstract A solid state receiving multicoupler for providing a plurality of output signals from a single signal source comprising in combination a first transistor emitter follower circuit, a second transistor emitter follower circuit connected in cascade with said first transistor emitter follower circuit and a plurality of parallel output transistor emitter follower circuits connected in cascade with said second transistor emitter follower circuit; each of said transistor emitter follower circuits including a single transistor having a base, a collector, and an emitter; each of said emitter follower circuits further including a base input circuit, an emitter output circuit, and means connecting said collector in common to said base input circuit and said emitter output circuit at a common reference point, input means for coupling said single signal means to the base input circuit of said first transistor emitter follower circuit, and a signal output coupling means in each output transistor emitter follower circuit for coupling a separate signal receiver across the emitter output circuit of a respective output transistor emitter follower circuit.
Inventors
- 👤 C Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:34
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/36; H03H11/365
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
312 words
A solid state receiving multicoupler for providing a plurality of output signals from a single signal source comprising in combination a first transistor emitter follower circuit, a second transistor emitter follower circuit connected in cascade with said first transistor emitter follower circuit and a plurality of parallel output transistor emitter follower circuits connected in cascade with said second transistor emitter follower circuit; each of said transistor emitter follower circuits including a single transistor having a base, a collector, and an emitter; each of said emitter follower circuits further including a base input circuit, an emitter output circuit, and means connecting said collector in common to said base input circuit and said emitter output circuit at a common reference point, input means for coupling said single signal source to the base input circuit of said first transistor emitter follower circuit, and a signal output coupling means in each output transistor emitter follower circuit for coupling a separate signal receiver across the emitter output circuit of a respective output transistor emitter follower circuit, each of said emitter output circuits including an inductor and a resistor connected in series circuit between the emitter of the respective emitter follower circuit transistor and the common reference point, said resistor providing a static load for the respective emitter follower circuit and said inductor providing a high impedance to said signal, the base of the transistor in said second transistor emitter follower circuit being directly coupled to the emitter of the transistor in said first transistor emitter follower circuit, and separate impedance network means being provided in circuit between the emitter of said second emitter follower circuit transistor and the base of each of said output emitter follower circuit transistors for circuit isolation and stabilization, said impedance network means comprising a resistor in parallel with the inductor included in the emitter output circuit of said second emitter follower circuit.
Claim 2
Dependent Claim
312 words
A solid state receiving multicoupler for providing a plurality of output signals from a single signal source comprising in combination a first transistor emitter follower circuit, a second transistor emitter follower circuit connected in cascade with said first transistor emitter follower circuit and a plurality of parallel output transistor emitter follower circuits connected in cascade with said second transistor emitter follower circuit; each of said transistor emitter follower circuits including a single transistor having a base, a collector, and an emitter; each of said emitter follower circuits further including a base input circuit, an emitter output circuit, and means connecting said collector in common to said base input circuit and said emitter output circuit at a common reference point, input means for coupling said single signal source to the base input circuit of said first transistor emitter follower circuit, and a signal output coupling means in each output transistor emitter follower circuit for coupling a separate signal receiver across the emitter output circuit of a respective output transistor emitter follower circuit, each of said emitter output circuits including an inductor and a resistor connected in series circuit between the emitter of the respective emitter follower circuit transistor and the common reference point, said resistor providing a static load for the respective emitter follower circuit and said inductor providing a high impedance to said signal, the base of the transistor in said second transistor emitter follower circuit being directly coupled to the emitter of the transistor in said first transistor emitter follower circuit, and separate impedance network means being provided in circuit between the emitter of said second emitter follower circuit transistor and the base of each of said output emitter follower circuit transistors for circuit isolation and stabilization, said impedance network means comprising a resistor in parallel with the inductor included in the emitter output circuit of said second emitter follower circuit.
Claim 3
Dependent Claim
22 words
The multicoupler set forth in claim 1 wherein an adjustable base bias means is provided in said first transistor emitter follower circuit.
Claim 4
Dependent Claim
25 words
The multicoupler set forth in claim 1 wherein said signal output coupling means includes a capacitor and resistor connected in series with an output jack.
Claim 5
Dependent Claim
39 words
The multicoupler set forth in claim 3 wherein said input coupling means includes a step up transformer means for stepping up the signal voltage to compensate for the signal voltage drop across the resistors in said output coupling means.
Claim 6
Dependent Claim
16 words
The multicoupler set forth in claim 1 wherein all of said transistors have substantially similar characteristics.
Claim 7
Dependent Claim
40 words
The multicoupler set forth in claim 5 wherein all of said transistors are NPN transistors, and a current and voltage regulated positive direct current source is connected to the collector of each transistor in all of said emitter follower circuits.
Claim 8
Dependent Claim
23 words
The multicoupler set forth in claim 1 wherein said input coupling means includes filter means for passing signals within a predetermined frequency band.
Claim 9
Dependent Claim
105 words
The multicoupler set forth in claim 1 wherein the circuit parameters of said multicoupler provide an overall voltage gain from the base of the transistor of said first emitter follower circuit to the emitter output of any one of said output emitter follower circuits is approximately zero and wherein the transistors each have a gain bandwidth product of 1,500 MHz giving the multicoupler an overall current gain in excess of 100 db at 30 MHz, and wherein said cascade connected emitter follower circuits inherently provide approximately 100 percent feedback, said high current gain and approximately 100 percent feedback resultIng in high circuit linearity and stability.
Claim 10
Dependent Claim
16 words
The multicoupler set forth in claim 1 wherein said signal source is a single receiving antenna.
Claim 11
Dependent Claim
204 words
A solid state receiving multicoupler operating in a selected frequency range and operative to prevent spurious oscillations at high frequencies than said selected frequency range for simultaneously coupling RF signals between an RF signal source and plural receivers, comprising signal input means for connection to said RF signal source and passing RF signals within a predetermined RF signal band while attenuating other RF signals lying outside of said band, amplifier means for amplifying said band of RF signals, said amplifier means comprising a driver amplifier having a signal input terminal connected to receive RF signals from said signal input means and a signal output, a plurality of parallel connected output amplifiers each of which is directly coupled to the output of said driver amplifier through a high frequency isolation and stabilization network including an inductor and resistor in parallel, said driver amplifier having at least one driver amplifier stage consisting of a transistor connected in a single ended emitter follower circuit, each of said plurality of parallel connected output amplifiers including a transistor connected in a single ended emitter follower circuit, and means for coupling RF signals from each of said plurality of parallel connected amplifiers to a separate one of said plural receivers.
Claim 12
Dependent Claim
204 words
A solid state receiving multicoupler operating in a selected frequency range and operative to prevent spurious oscillations at high frequencies than said selected frequency range for simultaneously coupling RF signals between an RF signal source and plural receivers, comprising signal input means for connection to said RF signal source and passing RF signals within a predetermined RF signal band while attenuating other RF signals lying outside of said band, amplifier means for amplifying said band of RF signals, said amplifier means comprising a driver amplifier having a signal input terminal connected to receive RF signals from said signal input means and a signal output, a plurality of parallel connected output amplifiers each of which is directly coupled to the output of said driver amplifier through a high frequency isolation and stabilization network including an inductor and resistor in parallel, said driver amplifier having at least one driver amplifier stage consisting of a transistor connected in a single ended emitter follower circuit, each of said plurality of parallel connected output amplifiers including a transistor connected in a single ended emitter follower circuit, and means for coupling RF signals from each of said plurality of parallel connected amplifiers to a separate one of said plural receivers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |