US3598981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor-switching circuit
Assignee: Electronic Associates Inc
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Filing: 1969-03-18
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Granted: 1971-08-10
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Expires: 1989-03-18
Abstract
Abstract A circuit is disclosed providing six time scales for an analog integrator by selectively connecting only three input terminals and automatically connecting the proper valued HOLD capacitor for the resultant time scale.
Inventors
- 👤 Ben D Conger
- 👤 Alfred G Tonnessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:59
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/184; G06G7/186
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
291 words
A circuit for controlling the rate of integration of an analog integrator by changing the value of capacitance in the feedback loop comprising: amplifier means having input, output, and feedback means for integrating an analog signal; six capacitors each having different values of capacitance for connection in said feedback means; relay means connected to said capacitors for controlling the connection of various ones of said capacitors in said feedback means said relay means including; a first relay having a first movable contact (32a) connected to a first of said capacitors (38), a second moveable contact (32f) connected to a second of said capacitors (40), a first fixed contact (32c) operatively associated with said first moveable contact connected to a third of said capacitors (37); a second fixed contact (32b) operatively associated with said first moveable contact and a third fixed contact (32d) operatively associated with said second moveable contact connected to a fourth of said capacitors (39); a second relay including a third moveable contact (31a) connected to said input means, a fourth fixed contact (31c) operatively associated with said third moveable contact connected to a fifth of said capacitors (36), a fifth fixed contact (31b) operatively associated with said third moveable contact connected to said third capacitor (37), a forth moveable contact (31d) connected to a sixth of said capacitors (41), and a sixth fixed contact (31f) operatively associated with said fourth moveable contact connected to said forth capacitor; a third relay including a fifth moveable contact (30a) connected to said fourth capacitor, and a seventh fixed contact connected to said input means; and respective relay control circuits connected to each of said relays for controlling the actuation thereof and therEby, the connection of said capacitors in said feedback means.
Claim 2
Dependent Claim
291 words
A circuit for controlling the rate of integration of an analog integrator by changing the value of capacitance in the feedback loop comprising: amplifier means having input, output, and feedback means for integrating an analog signal; six capacitors each having different values of capacitance for connection in said feedback means; relay means connected to said capacitors for controlling the connection of various ones of said capacitors in said feedback means said relay means including; a first relay having a first movable contact (32a) connected to a first of said capacitors (38), a second moveable contact (32f) connected to a second of said capacitors (40), a first fixed contact (32c) operatively associated with said first moveable contact connected to a third of said capacitors (37); a second fixed contact (32b) operatively associated with said first moveable contact and a third fixed contact (32d) operatively associated with said second moveable contact connected to a fourth of said capacitors (39); a second relay including a third moveable contact (31a) connected to said input means, a fourth fixed contact (31c) operatively associated with said third moveable contact connected to a fifth of said capacitors (36), a fifth fixed contact (31b) operatively associated with said third moveable contact connected to said third capacitor (37), a forth moveable contact (31d) connected to a sixth of said capacitors (41), and a sixth fixed contact (31f) operatively associated with said fourth moveable contact connected to said forth capacitor; a third relay including a fifth moveable contact (30a) connected to said fourth capacitor, and a seventh fixed contact connected to said input means; and respective relay control circuits connected to each of said relays for controlling the actuation thereof and therEby, the connection of said capacitors in said feedback means.
Claim 3
Dependent Claim
70 words
The circuit of claim 1 further including seventh (46) and eighth (47) capacitors connected to said output means for storing the output of said amplifier and wherein said third relay includes a sixth moveable contact (30d) connected to said eighth capacitor, and an eighth fixed contact connected to said seventh capacitor and to said input means for controlling the connection of said seventh and eighth capacitors in said feedback means.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |