Patent US2865201A successfully refreshed from Google Patents.
Patent US3673512A successfully refreshed from Google Patents.
US3673512A
Expired / Lapsed
US
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Servo amplifier
Assignee: Allen Bradley Co LLC
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Filing: 1970-09-22
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Granted: 1972-06-27
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Expires: 1990-09-22
Abstract
Abstract A servo amplifier is provided with associated circuitry which affords substantially independent compensation of both its frequency response and gain over the usable bandwidth whereby in a servo loop lead-lag compensation can be provided to establish desired output characteristics for the servo loop.
Inventors
- 👤 Ronnie G Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05B19/232; G05B6/00; G05B6/02; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445; G06; G06G; G06G7/00; G06G7/48; G06G7/62; G06G7/623; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41002; G05B2219/41133
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A servo amplifier comprising an amplifier having an input and an output, first potentiometer means for applying two separate signals to said amplifier input, a direct current feedback network connected between said amplifier input and output, and including a variable resistance means for adjusting the direct current gain of said amplifier, an alternating current feedback network connected between said amplifier input and output, and including adjustable means for determining the gain of said amplifier over predetermined frequency ranges.
Claim 2
Dependent Claim
78 words
A servo amplifier comprising an amplifier having an input and an output, first potentiometer means for applying two separate signals to said amplifier input, a direct current feedback network connected between said amplifier input and output, and including a variable resistance means for adjusting the direct current gain of said amplifier, an alternating current feedback network connected between said amplifier input and output, and including adjustable means for determining the gain of said amplifier over predetermined frequency ranges.
Claim 3
Dependent Claim
66 words
A servo amplifier as recited in claim 1 wherein said first potentiometer means includes a first potentiometer across which one of said two separate signals is applied, a second potentiometer across which the other of said two separate signals is applied, means for applying output of said first potentiometer across said second potentiometer, and means for applying output of said second potentiometer to said amplifier input.
Claim 4
Dependent Claim
103 words
A servo amplifier as recited in claim 1 wherein said adjustable means in said alternating current feedback network comprises a serial branch connected between amplifier input and output and two shunt branches connected to said serial branch, one of said two shunt branches including a first variable resistance means for establishing a first break frequency of said amplifier, said serial branch including a second variable resistance for establishing a second break frequency of said amplifier, and the other of said two shunt branches including a third variable resistor connected to said second variable resistor for establishing a third break frequency of said amplifier.
Claim 5
Dependent Claim
104 words
A servo amplifier as recited in claim 1 wherein said adjustable means in said alternating current feedback network includes three potentIometers each having a resistor and a slider moveable thereover, means connecting the resistor of a first of said three potentiometers between the output and input of said amplifier, a capacitor connecting the slider of said first of said three potentiometers to the resistor of a second of said three potentiometers, means connecting the resistor of a third of said three potentiometers to the output of said amplifier, and resistance means connecting the sliders of said second and third of said three potentiometers together.
Claim 6
Dependent Claim
134 words
A servo amplifier comprising an amplifier having an input and an output, means for applying first and second signals to said input including a first potentiometer means across which said first signal is applied, second potentiometer means across which said second signal is applied, means for connecting output of said first potentiometer means across said second potentiometer means, and means for applying output of said second potentiometer means to said amplifier input, a direct current feedback network connected between said amplifier output and input, said direct current feedback network including third potentiometer means for adjusting the amount of direct current feedback, and an alternating current feedback network connected between said amplifier output and input, said alternating current feedback means including variable resistance means for determining the gain of said amplifier at desired frequency locations.
Claim 7
Dependent Claim
134 words
A servo amplifier comprising an amplifier having an input and an output, means for applying first and second signals to said input including a first potentiometer means across which said first signal is applied, second potentiometer means across which said second signal is applied, means for connecting output of said first potentiometer means across said second potentiometer means, and means for applying output of said second potentiometer means to said amplifier input, a direct current feedback network connected between said amplifier output and input, said direct current feedback network including third potentiometer means for adjusting the amount of direct current feedback, and an alternating current feedback network connected between said amplifier output and input, said alternating current feedback means including variable resistance means for determining the gain of said amplifier at desired frequency locations.
Claim 8
Dependent Claim
148 words
A servo amplifier as recited in claim 5 wherein said alternating current feedback network includes a first capacitor having one side connected to said amplifier output, a point of reference potential, a first variable resistor means connected between the other side of said first capacitor and said point of reference potential, for establishing the gain of said amplifier at a first frequency, a second variable resistor means connected between said other side of said first capacitor and the input of said amplifier, for establishing the gain of said amplifier at a second frequency, higher than said first frequency, a second capacitor having one side connected to said second variable resistor means, and a third variable resistor means connected between the other side of said second capacitor and said point of reference potential for establishing the gain of said amplifier at a third frequency higher than said second frequency.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |