US 7,443,253 B2 · Detection device for detecting oscillator

Abstract

A detection device for detecting an oscillator is provided. The detection device includes an oscillator control circuit, a frequency-decreasing circuit and a display circuit. The oscillator control circuit is used for outputting the oscillator signal of the oscillator. The frequency-decreasing circuit is connected to the output of the oscillator control circuit and has a capacitor suitable for charging and discharging and a resistor, which can adjust the time constant of the oscillator signal. The display circuit is connected to the frequency-decreasing circuit for showing the output signal of the frequency-decreasing circuit. The detection device can decide whether the oscillator is normal or broken by observing a component of the display circuit, for example, the twinkling of a light emitting diode of the display circuit.

Claims9

Dependent claims

A detection device for detecting an oscillator, comprising:

an oscillator control circuit for outputting an oscillation signal of the oscillator;
a frequency-decreasing circuit, connected to an output of the oscillator control circuit, wherein the frequency-decreasing circuit has a capacitor suitable for charging and discharging and a resistor both for adjusting the time constant of the oscillation signal, the frequency-decreasing circuit has a first NOR gate and a second NOR gate, the capacitor is connected between an output terminal of the first NOR gate and an input terminal of the second NOR gate, and the resistor serially connects a reference voltage source to the capacitor;
and
a display circuit, connected to the frequency-decreasing circuit for displaying an output signal of the frequency-decreasing circuit.

1 more element

Dependencies are inferred from the claim text.

Detection device for detecting oscillator

Life of this patent

Detection device for detecting oscillator

Life of this patent

Abstract

Claims9