Patent US3585401A successfully refreshed from Google Patents.
US3585401A
Expired / Lapsed
US
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Amplitude discriminator
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1968-05-29
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Granted: 1971-06-15
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Expires: 1988-05-29
Abstract
Abstract An amplitude discriminator comprises a Schmitt-trigger circuit which receives the signal whose amplitude is to be monitored. The output of the Schmitt-trigger circuit is fed to a monostable multivibrator whose output is fed back to the input of the Schmitt-trigger circuit via a diode-capacitor circuit.
Inventors
- 👤 Heinz Georg Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:00
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/19; B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/16; H03K9/00; H03K9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
An amplitude discriminator without hysteresis adapted to be triggered by an arbitrary input signal and to indicate whether the input signal is above or below a definite threshold value, said discriminator comprising: a bistable trigger circuit having input means including a signal input for triggering the circuit to one of the stable positions and a control input for restoring the circuit to the other of the stable positions, said signal input being the input of said discriminator and being adapted to receive the arbitrary input signal; a first monostable timing circuit having an astable position and a rest position and having an input and at least one output which emits a signal when in the astable position; means for connecting the input of said first monostable timing circuit to the output of said trigger circuit; and a diode-capacitor series circuit connected between the output of said first monostable timing circuit and the control input of said trigger circuit so as to obtain a pulse at the control input of said trigger circuit when said monostable circuit returns to the rest position for restoring said trigger circuit to the other of said bistable positions.
Claim 2
Dependent Claim
193 words
An amplitude discriminator without hysteresis adapted to be triggered by an arbitrary input signal and to indicate whether the input signal is above or below a definite threshold value, said discriminator comprising: a bistable trigger circuit having input means including a signal input for triggering the circuit to one of the stable positions and a control input for restoring the circuit to the other of the stable positions, said signal input being the input of said discriminator and being adapted to receive the arbitrary input signal; a first monostable timing circuit having an astable position and a rest position and having an input and at least one output which emits a signal when in the astable position; means for connecting the input of said first monostable timing circuit to the output of said trigger circuit; and a diode-capacitor series circuit connected between the output of said first monostable timing circuit and the control input of said trigger circuit so as to obtain a pulse at the control input of said trigger circuit when said monostable circuit returns to the rest position for restoring said trigger circuit to the other of said bistable positions.
Claim 3
Dependent Claim
15 words
The amplitude discriminator of claim 1 wherein said bistable trigger circuit is a Schmitt-trigger circuit.
Claim 4
Dependent Claim
43 words
The amplitude discriminator of claim 2 and further comprising a transistor switch at the control input of said Schmitt-trigger circuit for applying a given voltage to the signaL input of said trigger circuit upon receipt of a pulse from said diode-capacitor series circuit.
Claim 5
Dependent Claim
21 words
The discriminator of claim 1 and further comprising a second monostable timing circuit connected to the output of said trigger circuit.
Claim 6
Dependent Claim
23 words
The discriminator of claim 1 and further comprising a second monostable timing circuit connected to the output of said first monostable timing circuit.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |