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Patent

Peak level indicating electronic circuit

Shoji Ueno
TLDR
In this article, a plurality of transistors are connected between the at least one rectifier and a general purpose integrated circuit with a threshold value, each of which is controlled in its on/off operation by the d.c. signal from the rectifier in order to control the output potential of the integrated circuit.
Abstract: 
An a.c. input signal is supplied to at least one input terminal to which at least one rectifier is connected for converting the a.c. input signal to a d.c. signal corresponding thereto. A plurality of transistors are connected between the at least one rectifier and a general purpose integrated circuit with a threshold value. Each of plural transistors is controlled in its on/off operation by the d.c. signal from the rectifier in order to control the output potential of the integrated circuit. A plurality of indicators are connected between a d.c. power source and outputs of the integrated circuit to be discretely and sequentially energized to indicate a peak level of the a.c. input signal.

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Citations
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Patent

Switch-mode power supply with dynamic adjustment of current sense magnitude

Peter M. Koninsky, +1 more
TL;DR: In this paper, the attenuator or gain element is cyclically switched so as to reduce the sensitivity to the cyclical current spikes when they occur, and the current sensor is coupled to sense a current which includes cyclical spikes.
Patent

Peak to peak signal detector for audio system

Alan Anderson Hoover
TL;DR: In this article, a peak to peak detector circuit for L+R audio signals is proposed. But the circuit is not suitable for high-frequency audio signals due to the high amplitude of the audio signal.
Patent

Level indicating methods and means

Jorgen Selmer Jensen
TL;DR: In this article, a method and apparatus for continuously measuring and indicating the variations of the intensity of an electric signal, such as a signal to be recorded on a tape recorder, which provides measuring to take place at successive measuring periods in such a manner that a measured result is yielded representing the maximum value of the signal intensity.
Patent

Schmitt circuit for semiconductor integrated circuit

Takahiro Fujitsu Limited Kato, +2 more
TL;DR: A Schmitt circuit for a semiconductor integrated circuit has resistances of predetermined resistors of the Schmitt circuits respectively selected from a plurality of resistances so as to obtain desired threshold voltages by selecting electrodes to which wiring is connected when producing the SIC according to the master slice method as mentioned in this paper.
Patent

Digital level display device

Shizuo Kakiuchi, +1 more
TL;DR: In this article, a digital level display device where the digital input signal is converted into an absolute value and further converted into its logarithm is presented. And the peak of the logrithm peak is detected and latched.
References
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Patent

Peak reading circuit

Harriman Herbert A, +1 more
Patent

Columnar display for electrical signals with digital signal limit set

Tumbush Gerald
TL;DR: In this article, a system for displaying the level of a variable electrical signal is disclosed, in which the variable electrical signals are converted into digital form, which are in turn decoded and arranged to consecutively activate a vertical series of indicator elements up and down the series in response to increases and decreases respectively in the digital signal, and with any preceding activated element being deactivated so that only a single individual indicator element corresponding to each digital signal is activated.
Patent

Light-emitting semiconductor display apparatus for displaying a band representation of a voltage analog of a measured parameter

Colin Simister Gaskell, +1 more
TL;DR: In this paper, a transducer receives from a transducers a voltage analogue signal representing the parameter to be measured and uses the signal to produce an illuminated band-representation of the parameter by a series of semiconductor light emission devices.
Patent

Exposure meter having means for preventing erroneous metering

O Maida
TL;DR: In this article, an exposure meter comprises exposure detecting means connected with an electric power source and including a photoelectric element, exposure inducing factors connected with the photoelectric elements to introduce exposure influencing factors thereinto, and introducing means to produce a proper exposure signal.