Amplifier testing apparatus having a comparator for comparing the amplifier output signal with a pair of reference signals
Abstract
Abstract RESPONSE TIME MEASURING APPARATUS FOR MEASURING RESPONSE TIME IN BOTH THE POSITIVE AND NEGATIVE DIRECTIONS OF AN ELECTRICAL DEVICE SUCH AS AN OPERATIONAL AMPLIFIER. THE INPUT TO THE DEVICE IS SWITCHED BETWEEN TWO DIFFERENT VOLTAGE LEVELS PRODUCING AN OUTPUT VOLTAGE HAVING POSITIVE AND NEGATIVE RAMPS. THESE ARE COUPLED INTO A COMPARATOR AND THE RAMPS ARE COMPARED TO TWO SWITCHABLE REFERENCE LEVEL VOLTAGES. THE COMPARATOR DETECTS THE CROSSOVERS OF THE VOLTAGES TO PROVIDE COMMAND SIGNALS FOR SWITCHING BOTH THE INPUT LEVEL VOLTAGES AND THE REFERENCE LEVEL VOLTAGES AND CAUSING AN ASSOCIATED LOGIC CIRCUIT TO PRODUCE PULSE TRAINS HAVING PULSES OF A TIME DURATION INDICATIVE OF THE RESPONSE TIMES OF THE OUTPUT VOLTAGE OF THE DEVICE.
Inventors
- 👤 William E Shoemaker
- 👤 David W Wilson
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |