Abstract A generator arrangement for producing electrical oscillations for testing an inductor and measuring its quality factor. The generator arrangement has a pair of terminals across which a test inductor is connected. A capacitor is connected to one of the terminals, so that the test inductor and the capacitor are in series. A feedback loop is connected between the terminals and includes connected in sequence: a full wave rectifier rectifying the oscillating voltage across the capacitor; a threshold value circuit producing rectangular pulses; a frequency divider producing two output signals, with respectively opposite phases and one-half the frequency of the output of the threshold value circuit; an AND circuit having its first input connected to one of the outputs of the frequency divider and its second input connected to the output of the threshold value circuit; a negated AND circuit having its first input connected to the other output of the frequency divider and its second input connected to the output of the threshold value circuit; and a summing circuit connected to the two AND circuits for summing their output signals.
Inventors
👤 G Muller
👤 R Bondiek
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 15:04
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
275 words
In a generator arrangement for producing electrical oscillations for testing an inductor and measuring its quality factor, the arrangement including a pair of terminals for connections to such a test inductor, a capacitor connected to one such terminal to be in series with the test inductor, with this series connection of the test inductor and the capacitor determining the frequency of the electrical oscillations, and feedback means having its input connected to such one terminal and its output connected to the other such terminals, the improvement wherein the feedback means comprises: full wave rectifier means connected to said one terminal for rectifying the oscillating voltage appearing across said capacitor; threshold value means connected to the output of said rectifier means for producing rectangular pulses in response to the peaks of the output signal emitted by said rectifier means; frequency divider means connected to the output of said threshold value means for dividing the frequencies of the rectangular pulses in half and producing first and second output signals having opposite phases with respect to each other; an AND circuit having its first input connected to said frequency divider means to receive the first output signal and its second input connected to the output of said threshold value means; a negated AND circuit having its first input connected to said frequency divider means to receive the second output signal and its second input connected to the output of said threshold value means; and summing means connected to the outputs of said AND circuit and said negated AND circuit for summing the output signals of said circuits, said summing means having its output connected to said other terminal.
Claim 2
Dependent Claim
275 words
In a generator arrangement for producing electrical oscillations for testing an inductor and measuring its quality factor, the arrangement including a pair of terminals for connections to such a test inductor, a capacitor connected to one such terminal to be in series with the test inductor, with this series connection of the test inductor and the capacitor determining the frequency of the electrical oscillations, and feedback means having its input connected to such one terminal and its output connected to the other such terminals, the improvement wherein the feedback means comprises: full wave rectifier means connected to said one terminal for rectifying the oscillating voltage appearing across said capacitor; threshold value means connected to the output of said rectifier means for producing rectangular pulses in response to the peaks of the output signal emitted by said rectifier means; frequency divider means connected to the output of said threshold value means for dividing the frequencies of the rectangular pulses in half and producing first and second output signals having opposite phases with respect to each other; an AND circuit having its first input connected to said frequency divider means to receive the first output signal and its second input connected to the output of said threshold value means; a negated AND circuit having its first input connected to said frequency divider means to receive the second output signal and its second input connected to the output of said threshold value means; and summing means connected to the outputs of said AND circuit and said negated AND circuit for summing the output signals of said circuits, said summing means having its output connected to said other terminal.
Claim 3
Dependent Claim
15 words
An arrangement as defined in claim 1 wherein said summing means is a push-pull amplifier.