US4590618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver having reference voltage stabilization circuitry
Assignee: Motorola Solutions Inc
•
Filing: 1984-03-13
•
Granted: 1986-05-20
•
Expires: 2004-03-13
Abstract
Abstract An RF receiver having a coupling capacitor connected between the back end of the receiver and the input to a data limiter circuit, a battery saver strobe feature which periodically turns the receiver ON and OFF and a precharge circuit for precharging the coupling capacitor. The receiver further includes a reference voltage stabilization circuit which prevents a received signal from reaching the output of the back end of the receiver during the precharging of the coupling capacitor in order to minimize the voltage offsets from the desired unmodulated carrier frequency reference voltage which results in erroneous data being decoded by the decoder portion of the RF receiver.
Inventors
- 👤 Michael C. Heath
- 👤 Leonard E. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0274; H04W52/028; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
163 words
An RF receiver having a receiver section, data processing circuitry, data limiting means connected to said data processing circuitry, a power source, and a coupling circuit means connected between said receiver section and said data limiting means, said coupling circuit means having a capacitor, comprising: first periodically activated switching means, connected to said data processing circuitry, having an input connectable to said power source and an output connected to said receiver section, for supplying power to said receiver section when said first switching means is periodically activated; second periodically activated switching means, having an input connectable to said power source and an output connected to said coupling circuit means, for charging said capacitor when said first switching means is periodically activated; and reference voltage stabilization means, connected to said receiver section, for preventing a received signal from reaching said capacitor when said first switching means is periodically activated, whereby the output of said receiver section is stabilized at an unmodulated carrier reference voltage.
Claim 2
Dependent Claim
163 words
An RF receiver having a receiver section, data processing circuitry, data limiting means connected to said data processing circuitry, a power source, and a coupling circuit means connected between said receiver section and said data limiting means, said coupling circuit means having a capacitor, comprising: first periodically activated switching means, connected to said data processing circuitry, having an input connectable to said power source and an output connected to said receiver section, for supplying power to said receiver section when said first switching means is periodically activated; second periodically activated switching means, having an input connectable to said power source and an output connected to said coupling circuit means, for charging said capacitor when said first switching means is periodically activated; and reference voltage stabilization means, connected to said receiver section, for preventing a received signal from reaching said capacitor when said first switching means is periodically activated, whereby the output of said receiver section is stabilized at an unmodulated carrier reference voltage.
Claim 3
Dependent Claim
35 words
An RF receiver, according to claim 1, wherein: said first switching means includes a first transistor connected to said data processing circuitry which is activated in response to a signal from said data processing circuitry.
Claim 4
Dependent Claim
84 words
An RF receiver, according to claim 1, wherein: said reference voltage stabilization means includes a first transistor connected to said data processing circuitry which is activated in response to a signal from said data processing circuitry, whereby said received signal is prevented from reaching the input of said coupling circuit means; and said second switching means includes a second transistor connected to said first transistor and said capacitor which is activated in synchronism with said first switching means and said reference voltage stabilization means.
Claim 5
Dependent Claim
89 words
An RF receiver, according to claim 1, wherein: said second switching means includes a first transistor connected to said capacitor and a second transistor connected to said first transistor and said data processing circuitry which is activated in synchronism with said first switching means whereby said capacitor is charged; and said reference voltage stabilization means includes a third transistor connected to said data processing circuitry which is activated in synchronism with said first switching means, whereby said received signal is prevented from reaching the input of said coupling means.
Claim 6
Dependent Claim
92 words
A circuit, for use with a receiver having a receiver section and a data limiter, said circuit including in combination: means for coupling said receiver section to said data limiter; a battery saver means for periodically supplying power, during a power ON time, to said receiver section; means for precharging said coupling means during said power ON time to set a predetermined level for said coupling means; and switch means for preventing said receiver from applying a received data signal to said coupling means during a portion of said power ON time.
Claim 7
Dependent Claim
92 words
A circuit, for use with a receiver having a receiver section and a data limiter, said circuit including in combination: means for coupling said receiver section to said data limiter; a battery saver means for periodically supplying power, during a power ON time, to said receiver section; means for precharging said coupling means during said power ON time to set a predetermined level for said coupling means; and switch means for preventing said receiver from applying a received data signal to said coupling means during a portion of said power ON time.
References Cited (Backward Citations)
US3164773A
Cited
US3571620A
Cited
US3748584A
Cited
US4114097A
Cited
US4274132A
Cited
US4185246A
Cited
US4380832A
Cited
US4481675A
Cited
US4479261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |