Abstract This invention relates to a monostable multivibrator which is operated in the non-saturated state. The monostable multivibrator circuit includes a time constant circuit which has a capacitor, an amplifier circuit which receives an output signal of the time constant circuit, a positive feedback circuit which is connected between an output end of the amplifier circuit and an input end of the time constant circuit, and a trigger terminal which is disposed in a circuit loop constructed of the time constant circuit, the amplifier circuit and the positive feedback circuit; and it is characterized in that the positive feedback circuit comprises a signal amplifying transistor which has a base receiving an output of the amplifier circuit and a collector supplying a signal to the time constant circuit, and a level clamp circuit which is coupled to the collector of the transistor in order to hold a collector output potential of the transistor higher than a base input potential thereof.
Inventors
👤 Takeshi Wada
👤 Masanori Ienaka
👤 Yukihiko Miyamoto
👤 Tsuneo Yamada
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-04 15:28
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/023
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A monostable multivibrator circuit including a time constant circuit which includes a capacitor, an amplifier circuit which receives an output signal of the time constant circuit, a positive feedback circuit which is connected between an output end of the amplifier circuit and an input end of the time constant circuit, and a trigger terminal which is disposed in a circuit loop constructed of the time constant circuit, the amplifier circuit and the positive feedback circuit, characterized in that said positive feedback circuit comprises a signal amplifying transistor which has a base receiving an output of said amplifier circuit, a collector supplying a signal to said time constant circuit and an emitter connected to an emitter of another transistor in common, to constitute a differential amplifier circuit, and a level clamp circuit which is coupled to said collector of said signal amplifying transistor in order to hold a collector output potential of said signal amplifying transistor higher than a base input potential thereof.
Claim 2
Dependent Claim
162 words
A monostable multivibrator circuit including a time constant circuit which includes a capacitor, an amplifier circuit which receives an output signal of the time constant circuit, a positive feedback circuit which is connected between an output end of the amplifier circuit and an input end of the time constant circuit, and a trigger terminal which is disposed in a circuit loop constructed of the time constant circuit, the amplifier circuit and the positive feedback circuit, characterized in that said positive feedback circuit comprises a signal amplifying transistor which has a base receiving an output of said amplifier circuit, a collector supplying a signal to said time constant circuit and an emitter connected to an emitter of another transistor in common, to constitute a differential amplifier circuit, and a level clamp circuit which is coupled to said collector of said signal amplifying transistor in order to hold a collector output potential of said signal amplifying transistor higher than a base input potential thereof.
Claim 3
Dependent Claim
49 words
A monostable multivibrator circuit according to claim 1, wherein said level clamp circuit comprises diode means which is inserted between a power source having a fixed potential higher than the base input potential and said collector of said transistor, so as to be forward-biased when said transistor turns "on".
Claim 4
Dependent Claim
86 words
A monostable multivibrator circuit according to any one of claims 1 or 2, wherein said amplifier circuit is made up of a differential amplifier in which emitters of a pair of transistors are connected in common, said time constant circuit is coupled to a base of one of said pair of transistors, said positive feedback circuit is coupled to a collector of said one transistor, and an output of said monostable multivibrator circuit is derived from a collector of the other of said pair of transistors.