US3609554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for switching an electrical signal
Assignee: US Philips Corp
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Filing: 1968-10-16
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Granted: 1971-09-28
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Expires: 1988-10-16
Abstract
Abstract A circuit for switching a connection point from variable signal to a reference potential, employing a transistor having its control electrode connected to a variable DC voltage, and its emitter-collector path connected by resistors between a potential divider and a reference point. A pair of similarly poled diodes are connected across the emitter-collector path, the junction of said diodes connected to said connection point.
Inventors
- 👤 Albert Stoker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:37
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/08; H03J7/10; H03J7/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
Circuit arrangement for switching a connection point from an electrical signal which can be varied both positively and negatively relative to a reference potential, said reference potential being selectively provided at said connection point for the transmission of the signal as a function of a DC voltage controlling the circuit arrangement, comprising a transistor having a control electrode and first and second output electrodes, means for applying said DC voltage controlling the circuit arrangement to said control electrode, a voltage supply source having a positive and a negative terminal, first resistance means included between the first output electrode of the transistor and the positive terminal of the voltage supply source, second resistance means included between the second output electrode of the transistor and the negative terminal of the voltage supply source, and first diode means the anode of which is directly connected to the first output electrode of the transistor and second diode means the cathode of which is directly connected to the second output electrode of the transistor, the cathode of the first diode means and the anode of the second diode means being connected together and to the said connection point for the transmission of the signal.
Claim 2
Dependent Claim
199 words
Circuit arrangement for switching a connection point from an electrical signal which can be varied both positively and negatively relative to a reference potential, said reference potential being selectively provided at said connection point for the transmission of the signal as a function of a DC voltage controlling the circuit arrangement, comprising a transistor having a control electrode and first and second output electrodes, means for applying said DC voltage controlling the circuit arrangement to said control electrode, a voltage supply source having a positive and a negative terminal, first resistance means included between the first output electrode of the transistor and the positive terminal of the voltage supply source, second resistance means included between the second output electrode of the transistor and the negative terminal of the voltage supply source, and first diode means the anode of which is directly connected to the first output electrode of the transistor and second diode means the cathode of which is directly connected to the second output electrode of the transistor, the cathode of the first diode means and the anode of the second diode means being connected together and to the said connection point for the transmission of the signal.
Claim 3
Dependent Claim
22 words
A circuit arrangement as claimed in claim 1 wherein said first resistance means and said second resistance means have approximately equal resistance-values.
Claim 4
Dependent Claim
27 words
A circuit arrangement as claimed in claim 1 wherein said first and second diode means consist of diodes having a high threshold voltage in the pass direction.
Claim 5
Dependent Claim
67 words
A circuit arrangement as claimed in claim 1 further including means for coupling the signal at the cathode of the first diode means and the anode of the second diode means to an automatic frequency control circuit, and that said varying signal is a voltage obtained by rectification of a radio signal received and applied to the control electrode of said transistor for controlling the circuit arrangement.
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 |