Voltage modulator circuit to control light emission for non-invasive timing measurements
First Claim
Patent Images
1. Non-invasive apparatus to accurately measure the time difference between two signals having edges delayed with respect to one another comprising:
- a. a voltage modulator circuit to receive the two signals as inputs and providing an output voltage modulated with said timing difference; and
b. a beacon device to receive the output voltage of said modulator circuit and converting it into an emission intensity.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus accurately measures the time difference between two signal edges by optically detecting the emission from a “beacon device” that is modulated as a function of time difference. Through the use of this modulation it is possible to perform timing measurement accurately. Embodiments of a voltage modulator circuit modulate timing information into emission intensity. The method and system of the present invention can be used in applications such as clock skew and pulse width measurements.
12 Citations
10 Claims
-
1. Non-invasive apparatus to accurately measure the time difference between two signals having edges delayed with respect to one another comprising:
-
a. a voltage modulator circuit to receive the two signals as inputs and providing an output voltage modulated with said timing difference; and
b. a beacon device to receive the output voltage of said modulator circuit and converting it into an emission intensity. - View Dependent Claims (2, 3)
-
-
4. Non-invasive apparatus to accurately measure the time difference between two signals having edges delayed with respect to one another comprising:
-
a voltage modulator circuit to receive the two signals as inputs and providing an output voltage modulated with said timing difference; and
a beacon device to receive the output voltage of said modulator circuit and converting it into an emission intensity;
whereinsaid modulator circuit comprises;
a. a capacitor to supply said modulated output;
b. a precharge transistor which when actuated couples said capacitor with a supply voltage to precharge it to that voltage; and
c. a discharge circuit coupled to discharge said capacitor for a period equal to said time difference between two signals. - View Dependent Claims (5, 6, 7, 8, 9, 10)
-
Specification