Signal sampling system
First Claim
Patent Images
1. A sampling time base, comprising:
- means for generating clock edges at a predetermined frequency;
digital timing means for generating a digital delay signal substantially coincident with the Nth clock edge of a predetermined number N of clock edges, thereby establishing a digital timing interval from the first to the Nth clock edge;
analog timing means responsive to said digital delay signal for initiating an analog timing signal substantially coincident with said Nth clock edge; and
means for generating a sampling pulse at the end of a predetermined analog timing interval of said analog timing signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A signal sampling system includes a combined digital and analog acquisition time base for accurately sampling and displaying an extremely short duration electrical event superimposed on a long time duration signal. The signal sampling system of the present invention is intended for use in stimulus-response situations, and both stimulus and response signals are synchronized with the clock of the digital portion of the time base. The system may be operated under microprocessor control, providing both flexibility and programmability, in turn permitting not only acquisition of waveforms that start and stop at arbitrary points with extreme precision, but signal averaging or smoothing as well.
140 Citations
12 Claims
-
1. A sampling time base, comprising:
-
means for generating clock edges at a predetermined frequency; digital timing means for generating a digital delay signal substantially coincident with the Nth clock edge of a predetermined number N of clock edges, thereby establishing a digital timing interval from the first to the Nth clock edge; analog timing means responsive to said digital delay signal for initiating an analog timing signal substantially coincident with said Nth clock edge; and means for generating a sampling pulse at the end of a predetermined analog timing interval of said analog timing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A signal sampling system, comprising:
-
a precision time delay generator having combined digital timing means and analog timing means for generating sampling pulses after consecutive digital and analog timing intervals, said digital timing means generating delay signals at predetermined counts of a clock signal and said analog timing means interpolating between said predetermined counts to produce said sampling pulses after combined digital and analog time delay with high temporal resolution; means responsive to said sampling pulses for acquiring and storing samples of an input signal; and logic control means coupled to said precision delay generator for selecting time interval values for said digital timing means and said analog timing means. - View Dependent Claims (9, 10, 11, 12)
-
Specification