US3624414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for polarity reversal of signals from a signal source
Assignee: US Philips Corp
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Filing: 1969-12-12
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Granted: 1971-11-30
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Expires: 1989-12-12
Abstract
Abstract A polarity reversal arrangement provided with two seriesarranged electronic switching elements, for example, for use in pulse code modulation. freedom In order to satisfy the strict requirements of polarity reversal at the instants of an alternation of polarity of the signals from a signal source and the requirement of freedom from distortion, the polarity reversal arrangement is provided with a bridge composed of resistors wherein the signal source is connected to one end of a diagonal branch of the bridge and wherein the input circuit of an amplifier reversing the polarity of the input signal is connected to the other end of this diagonal branch and wherein the series arrangement of the two electronic switching elements is included between the ends of the other diagonal branch, the junction of the electronic switching elements being connected to the output circuit of the amplifier, while the output signals of the polarity reversal arrangement are derived from one end of the last-mentioned diagonal branch of the bridge.
Inventors
- 👤 Leonardus Petrus Jozef Va Dijk
- 👤 Geerlof Jan Korevaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/042; H03; H03M; H03M1/00; H03M1/12; H03M1/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A circuit arrangement for polarity reversal of signals from a signal source, which circuit arrangement is provided with two series-arranged electronic switching elements, characterized in that the polarity reversal arrangement is provided with a bridge composed of resistors, the signal source being connected to one end of a diagonal branch of the bridge and the input circuit of an amplifier which reverses the polarity of the input signal being connected to the other end of the said diagonal branch, the series arrangement of the two electronic switching elements being included between the ends of the other diagonal branch, the junction of the electronic switching elements being connected to the output circuit of the amplifier while the output signals of the polarity reversal arrangement are derived from one end of the last-mentioned diagonal branch of the bridge.
Claim 2
Dependent Claim
136 words
A circuit arrangement for polarity reversal of signals from a signal source, which circuit arrangement is provided with two series-arranged electronic switching elements, characterized in that the polarity reversal arrangement is provided with a bridge composed of resistors, the signal source being connected to one end of a diagonal branch of the bridge and the input circuit of an amplifier which reverses the polarity of the input signal being connected to the other end of the said diagonal branch, the series arrangement of the two electronic switching elements being included between the ends of the other diagonal branch, the junction of the electronic switching elements being connected to the output circuit of the amplifier while the output signals of the polarity reversal arrangement are derived from one end of the last-mentioned diagonal branch of the bridge.
Claim 3
Dependent Claim
62 words
A circuit arrangement as claimed in claim 1, characterized in that output terminals of the signal source are connected to the said end of the diagonal branch and a point of fixed potential, respectively, while in the absence of signals from the signal source both the input circuit and the output circuit of the amplifier are adjusted to the said fixed potential.
Claim 4
Dependent Claim
35 words
A circuit arrangement as claimed in claim 1, wherein the bridge the two resistors connected to the signal source and the two resistors connected to the input of the amplifier have been made pairwise equal.
Claim 5
Dependent Claim
116 words
A circuit arrangement as claimed in claim 1, wherein the amplifier is provided with an input amplifier stage employing a field effect transistor, the control electrode of said input amplifier stage being connected to the said end of the diagonal branch of the bridge and the source electrode being connected to a succeeding amplifier stage, while the input amplifier stage is fed by a current source in the form of a difference amplifier employing two transistors, the base electrode of one transistor being connected to a point of fixed potential and the base electrode of the other transistor being connected to the output of the amplifier through a lowpass filter which does not pass signal frequencies.
Claim 6
Dependent Claim
18 words
A circuit arrangement as claimed in claim 1, wherein the signal source is formed by a current source.
Claim 7
Dependent Claim
39 words
A circuit arrangement as claimed in claim 2, wherein the electronic switching elements are formed by diodes which, dependent on the polarity of the signals from the signal source, are brought from their blocked condition to the conducting condition.
Claim 8
Dependent Claim
37 words
A circuit arrangement as claimed in claim 1, wherein each electronic switching element is provided with a control electrode which are brought to their conducting condition by control signals through control lines connected to the controL electrodes.
References Cited (Backward Citations)
US3130325A
Cited
US3112449A
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US3196291A
Cited
US3311835A
Cited
US3480794A
Cited
US3509372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |