Temperature stable one-shot multi-vibrator
阅读：189发布：2021-08-17
专利汇可以提供Temperature stable one-shot multi-vibrator专利检索，专利查询，专利分析的服务。并且Disclosed are temperature compensated one-shot multivibrator circuits particularly adapted for use in industrial tachometers. The one-shots have compensating diodes or transistor junctions in the collector circuits of the timing transistors. In some of the circuits the junctions are matched to insure equal current flow through both the compensated and compensating junctions. They produce pulses have a pulse width that is substantially constant over a wide temperature range.，下面是Temperature stable one-shot multi-vibrator专利的具体信息内容。
1. A one-shot multi-vibrator comprising first and second transistors each having an emitter, a collector, and a base, a pair of power supply terminals for coupling a DC power supply across the emitter-collector circuits of said transistors, means for supplying an input signal to the base of the first of said transistors, means for deriving an output signal from the collector of the second of said transistors, a timing capacitor coupled between the collector of said first transistor and the base of said second transistor, a resistor coupling the collector of said second transistor to said first transistor, a timing resistor coupling one of said power supply terminals to the base of said second transistor, means providing a semi-conductor diode junction coupling said timing capacitor to the collector of said first transistor, a first semi-conductor diode junction coupling one side of said timing capacitor to the base of said second transistor and second and third semiconductor diode junctions coupling the other side of said timing capacitor to the collector of said first transistor, and a fourth semiconductor diode junction coupling said one side of said timing capacitor to the collector of said second transistor.
2. A one-shot according to claim 1 wherein all of said diode junctions are formed by transistors.
3. A one-shot according to claim 2 wherein at least two of said junctions are formed by a Darlington circuit.
4. A one-shot according to claim 3 wherein all of said junctions are formed by a pair of Darlington circuits.
5. A one-shot according to claim 1 wherein at least one of said diode junctions is formed by a transistor.
6. A one-shot according to claim 1 wherein one of said diode junctions is formed by a transistor and the remainder are formed by rectifier diodes.
7. A one-shot multi-vibrator comprising first and second transistors each having an emitter, a collector and a base, a pair of power supply terminals for coupling a DC power supply across the emitter-collector circuits of said transistors, an input terminal coupled to the base of the first of said transistors, an output terminal coupled to the collector of the second of said transistors, a timing capacitor coupled between the collector of said first transistor and the base of said second transistor, a resistor coupling the collector of said second transistor to said first transistor, a timing resistor coupling one of said power supply terminals to one side of said timing capacitor, a first diode coupling said one side of said capacitor to the base of said second transistor, a second diode coupling said one side of said capacitor to the collector of said second transistor, a third transistor having an emitter, collector and base coupling the other side of said timing capacitor to the collector of said first transistor, and a third diode coupled between the collector and base of said third transistor.
8. A one-shot according to claim 7 wherein said transistors are all NPN junction transistors.
9. A one-shot according to claim 7 wherein said diodes are all of the same type and said transistors are all of the same type so that the currents flowing through them are matched.
10. A one-shot according to claim 7 wherein at least one of said second and third transistors forms part of a Darlington circuit.
11. A one-shot according to claim 7 wherein said second transistor comprises part of a first Darlington pair and said third transistor forms part of a second Darlington pair.
12. A one-shot according to claim 7 wherein the emitter of said third transistor is coupled to the collector of said first transistor.
13. A one-shot according to claim 12 including a pair of matched resistors coupling said one power supply terminal to the collectors of said second and third transistors.
14. A one-shot according to claim 7 including a fourth transIstor coupling the collector of said second transistor to said first transistor.
15. A one-shot according to claim 14 including a fifth transistor coupled in the collector-base circuit of said third transistor and a sixth transistor coupled in the collector-base circuit of said second transistor.
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