US4228409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission arrangement having an adjustable network
Assignee: US Philips Corp
•
Filing: 1978-12-21
•
Granted: 1980-10-14
•
Expires: 1998-12-21
Abstract
Abstract A transmission arrangement provided with at least one adjustable network whose transfer characteristic between input and output as a function of the frequency ω within a prescribed frequency band is approximately equal to C exp [kf(ω)], where C is a constant and k a continuously variable parameter. A simple design as well as a large practically feasible adjustment range are obtained because the adjustable network comprises a plurality of channels between input and output and the transfer characteristic of a channel is approximately proportional to a term, different for each channel, from the series of terms of the development of exp [kf(ω)] to powers of kf(ω), the number of terms corresponding with the number of channels.
Inventors
- 👤 Kornelis J. Wouda
- 👤 Alberto M. Giacometti
- 👤 Willem Riede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:46
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03006; H04L25/03012; H04L25/03019; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/143; H04B3/145
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
Transmission arrangement comprising at least one adjustable network having a transfer characteristic between input and output as a function of the frequency ω within a predescribed frequency band approximately equal to C exp [kf(ω)], where C is a constant and k a continuously variable parameter, wherein the adjustable network comprises a plurality of channels between input and output, the transfer characteristic of a channel being approximately proportional to a term, different for each channel, from the series of terms of the development of exp {kf(ω)} to powers of kf(ω), the number of terms corresponding with the number of channels.
Claim 2
Dependent Claim
99 words
Transmission arrangement comprising at least one adjustable network having a transfer characteristic between input and output as a function of the frequency ω within a predescribed frequency band approximately equal to C exp [kf(ω)], where C is a constant and k a continuously variable parameter, wherein the adjustable network comprises a plurality of channels between input and output, the transfer characteristic of a channel being approximately proportional to a term, different for each channel, from the series of terms of the development of exp {kf(ω)} to powers of kf(ω), the number of terms corresponding with the number of channels.
Claim 3
Dependent Claim
97 words
A transmission arrangement as claimed in claim 1, wherein said adjustable network comprises a first control element having an input coupled to said adjustable network input, and first and second outputs; a second control element having an input coupled to said first element first output, and two outputs; said channels numbering three and respectively comprising a first impedance means coupled between said second element first and second outputs, a second impedance means coupled between said second element second output and said first element second output; and a third impedance means coupled to said first element second output.
Claim 4
Dependent Claim
17 words
A transmission arrangement as claimed in claim 1, wherein said third impedance means comprises a pure resistance.
Claim 5
Dependent Claim
17 words
A transmission arrangement as claimed in claim 3, wherein said third impedance means comprises a complex impedance.
Claim 6
Dependent Claim
33 words
A transmission arrangement as claimed in claim 4, wherein said complex impedance comprises a series arrangement including a first resistor and a capacitor, and a second resistor parallel coupled to said series arrangement.
Claim 7
Dependent Claim
20 words
A transmission arrangement as claimed in claim 2, wherein said control elements each comprise a pair of emitter coupled transistors.
Claim 8
Dependent Claim
88 words
A transmission arrangement as claimed in claim 1, wherein said adjustable network comprises a first control element having an input coupled to said adjustable network input and an output; a second control element having an input coupled to said first element output and an output; said channels numbering three and respectively comprising a first admittance means coupled to said network input, a second admittance means coupled to said first element output, and a third admittance means coupled to said second element output; said admittance means being coupled together.
Claim 9
Dependent Claim
85 words
A transmission arrangement as claimed in claim 1, wherein said channels number three, each channel comprising a current source coupled to said network input; an admittance means coupled to said current sources; and further comprising a first control element having a input coupled to a first of said current sources and an output; and a second control element having an input coupled to said first element output and to a second of said current sources and an output coupled to the third remaining current source.
Claim 10
Dependent Claim
20 words
A transmission arrangement as claimed in claim 8, wherein said control elements each comprise a pair of emitter coupled transistors.
References Cited (Backward Citations)
US3210683A
Cited
US3452292A
Cited
US3509481A
Cited
US3663898A
Cited
US3743959A
Cited
US4045748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |