Patent US4362955A successfully refreshed from Google Patents.
US4362955A
Expired / Lapsed
US
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Current boost circuit for a pulse generator output stage
Assignee: Micron Technology Inc
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Filing: 1980-12-18
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Granted: 1982-12-07
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Expires: 2000-12-18
Abstract
Abstract A pulse generator output stage is provided with a current boost circuit to generate additional current substantially contemporaneously with pulse transitions in order to achieve fast output risetimes and falltimes. Switched current generators are arranged to produce a square-wave current having current spikes on the rising and falling edges to rapidly charge and discharge inherent circuit capacitances and thereby produce square-wave voltage pulses with a minimum of power consumption.
Inventors
- 👤 William H. Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:29
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for summing said square-wave current and said boost currents; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal, wherein said square-wave current generating means comprises a switched current source for developing the positive-going portion of said pulse voltage output signal and a switched current sink for developing the negative-going portion of said output signal.
Claim 2
Dependent Claim
106 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for summing said square-wave current and said boost currents; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal, wherein said square-wave current generating means comprises a switched current source for developing the positive-going portion of said pulse voltage output signal and a switched current sink for developing the negative-going portion of said output signal.
Claim 3
Dependent Claim
130 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for summing said square-wave current and said boost currents; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal, wherein said boost current generating means includes a first differentiating network connected to a boost current source to produce a positive-going current spike in response to a positive-going transition of said input signal, and a second differentiating network connected to a boost current sink to produce a negative-going current spike in response to a negative-going transition of said input signal.
Claim 4
Dependent Claim
130 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for summing said square-wave current and said boost currents; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal, wherein said boost current generating means includes a first differentiating network connected to a boost current source to produce a positive-going current spike in response to a positive-going transition of said input signal, and a second differentiating network connected to a boost current sink to produce a negative-going current spike in response to a negative-going transition of said input signal.
Claim 5
Dependent Claim
81 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for generating a steady state current; means for summing said square-wave current, said boost currents, and said steady state current; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal.
Claim 6
Dependent Claim
81 words
A pulse generator output stage, comprising: means for receiving a voltage square-wave input signal; means responsive to said input signal for generating a square-wave current; means responsive to said input signal for generating boost currents substantially contemporaneous with the transitions of said input signal; means for generating a steady state current; means for summing said square-wave current, said boost currents, and said steady state current; and an output amplifier responsive to said summed currents for generating a pulse voltage output signal.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |