US3609556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed bias supply arrangement for long tailed pair transistor configuration
Assignee: US Philips Corp
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Filing: 1968-05-07
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Granted: 1971-09-28
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Expires: 1988-05-07
Abstract
Abstract A circuit arrangement comprising a DC coupled amplifier and at least a preceding stage incorporating a pair of transistors, the bias for an electrode of each transistor of said preceding stage being derived from said DC coupled amplifier, each being determined by a multiple being on integer of the bias-emitter junction potential of transistors incorporated in said DC amplifier.
Inventors
- 👤 William Douglas Benson
- 👤 John Stuart Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:38
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03D; H03D7/00; H03D7/12; H03F1/00; H03F1/30; H03F1/302; H03F3/189; H03F3/19; H03F3/191; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A circuit arrangement for supplying a relatively independent fixed bias supply comprising a first stage having first and second transistors, each of said transistors having base-emitter and collector electrodes, the emitter electrodes of each transistor commonly connected, a second stage having an input connected to the output of said first stage, said second stage including a plurality of series connected transistor junctions forming DC amplifier for signals from said first stage, first means for deriving a fixed multiple of the junction bias signal from a first point coupled to a junction of one of said second stage transistors, second means for deriving said fixed multiple signal from a second point coupled to a junction of another of said second stage transistors, said first and second means coupling said fixed multiple of the junction bias signal to each of said first stage transistor base electrodes for providing a fixed bias supply to said first stage transistor, thereby rendering said first stage transistors base biasing relatively independent of supply voltage.
Claim 2
Dependent Claim
168 words
A circuit arrangement for supplying a relatively independent fixed bias supply comprising a first stage having first and second transistors, each of said transistors having base-emitter and collector electrodes, the emitter electrodes of each transistor commonly connected, a second stage having an input connected to the output of said first stage, said second stage including a plurality of series connected transistor junctions forming DC amplifier for signals from said first stage, first means for deriving a fixed multiple of the junction bias signal from a first point coupled to a junction of one of said second stage transistors, second means for deriving said fixed multiple signal from a second point coupled to a junction of another of said second stage transistors, said first and second means coupling said fixed multiple of the junction bias signal to each of said first stage transistor base electrodes for providing a fixed bias supply to said first stage transistor, thereby rendering said first stage transistors base biasing relatively independent of supply voltage.
Claim 3
Dependent Claim
200 words
A circuit arrangement for supplying a relatively independent fixed bias supply comprising a first stage having first and second transistors, each of said transistors having base, emitter and collector electrodes, the emitter electrodes of each transistor commonly connected, a second stage having an input connected to the output of said first stage, said second stage including a first plurality of forward biased transistor base-emitter junctions connected in series relationship to a first point and a second plurality of forward biased transistor base-emitter junctions connected in series to a second point, said second stage forming a DC amplifier for signals from said first stage, first means for deriving a fixed multiple of the junction bias signal from said first point coupled to a junction of one of said second stage transiStors second means for deriving a fixed multiple signal from said second point coupled to a junction of another of said second stage transistors, said first and second means coupling said fixed multiple of the junction bias signal to each of said first stage transistor base electrodes for providing a fixed bias supply to said first stage transistors, thereby rendering said first stage transistors base biasing relatively independent of supply voltage.
Claim 4
Dependent Claim
200 words
A circuit arrangement for supplying a relatively independent fixed bias supply comprising a first stage having first and second transistors, each of said transistors having base, emitter and collector electrodes, the emitter electrodes of each transistor commonly connected, a second stage having an input connected to the output of said first stage, said second stage including a first plurality of forward biased transistor base-emitter junctions connected in series relationship to a first point and a second plurality of forward biased transistor base-emitter junctions connected in series to a second point, said second stage forming a DC amplifier for signals from said first stage, first means for deriving a fixed multiple of the junction bias signal from said first point coupled to a junction of one of said second stage transiStors second means for deriving a fixed multiple signal from said second point coupled to a junction of another of said second stage transistors, said first and second means coupling said fixed multiple of the junction bias signal to each of said first stage transistor base electrodes for providing a fixed bias supply to said first stage transistors, thereby rendering said first stage transistors base biasing relatively independent of supply voltage.
Claim 5
Dependent Claim
72 words
A circuit arrangement as claimed in claim 1 for the amplification of a modulated carrier wave, wherein at least one transistor junction of the DC coupled transistor amplifier is connected as a signal detector for a modulated carrier wave introduced to said preceding stage and the forward junction potential of said one transistor junction of the DC coupled amplifier determines the base bias supply of only one of said first stage transistors.
Claim 6
Dependent Claim
74 words
A circuit arrangement as claimed in claim 1 wherein the said pair of transistors are coupled as a long-tailed-pair and operate as a mixing stage, one of the transistors of said DC coupled transistor amplifier being connected as a local oscillator, the oscillation of said local oscillator and base bias supply for one of the transistors coupled as a long-tailed-pair being derived from the emitter electrode of said transistor connected as a local oscillator.
Claim 7
Dependent Claim
74 words
The combination of claim 2 wherein the said pair of first stage transistors are coupled as a long-tailed-pair and operate as a mixing stage, one of the transistors of said DC coupled transistor amplifier being connected as a local oscillator, the oscillation of said local oscillator and the base bias supply for one of the transistors coupled as a long-tailed-pair being derived from the emitter electrode of said transistor connected as a local oscillator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |