Precision envelope detector and linear rectifier circuitry
Abstract
Disclosed is a method and apparatus for the precise linear rectification and envelope detection of oscillatory signals. The signal is applied to a voltage-to-current converter which supplies current to a constant current sink. The connection between the converter and the sink is also applied through a diode and an output load resistor to a ground connection. The connection is also connected to ground through a second diode of opposite polarity from the diode in series with the load resistor. Very small amplitude voltage signals applied to the converter will cause a small change in the output current of the converter, and the difference between the output current and the constant current sink will be applied either directly to ground through the single diode, or across the output load resistor, dependent upon the polarity. Disclosed also is a full-wave rectifier utilizing constant current sinks and voltage-to-current converters. Additionally, disclosed is a combination of the voltage-to-current converters with differential integrated circuit preamplifiers to boost the initial signal amplitude, and with low pass filtering applied so as to obtain a video or signal envelope output.
- Inventors:
-
- Richland, WA
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- OSTI Identifier:
- 863537
- Patent Number(s):
- 4194240
- Assignee:
- United States of America (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- precision; envelope; detector; linear; rectifier; circuitry; disclosed; method; apparatus; precise; rectification; detection; oscillatory; signals; signal; applied; voltage-to-current; converter; supplies; current; constant; sink; connection; diode; output; load; resistor; ground; connected; opposite; polarity; series; amplitude; voltage; change; difference; directly; single; dependent; full-wave; utilizing; sinks; converters; additionally; combination; differential; integrated; circuit; preamplifiers; boost; initial; pass; filtering; obtain; video; constant current; output current; opposite polarity; voltage signal; integrated circuit; voltage signals; pass filter; wave rectifier; output load; signal amplitude; rectifier circuit; envelope detection; precise linear; /363/324/327/
Citation Formats
Davis, Thomas J. Precision envelope detector and linear rectifier circuitry. United States: N. p., 1980.
Web.
Davis, Thomas J. Precision envelope detector and linear rectifier circuitry. United States.
Davis, Thomas J. Tue .
"Precision envelope detector and linear rectifier circuitry". United States. https://www.osti.gov/servlets/purl/863537.
@article{osti_863537,
title = {Precision envelope detector and linear rectifier circuitry},
author = {Davis, Thomas J},
abstractNote = {Disclosed is a method and apparatus for the precise linear rectification and envelope detection of oscillatory signals. The signal is applied to a voltage-to-current converter which supplies current to a constant current sink. The connection between the converter and the sink is also applied through a diode and an output load resistor to a ground connection. The connection is also connected to ground through a second diode of opposite polarity from the diode in series with the load resistor. Very small amplitude voltage signals applied to the converter will cause a small change in the output current of the converter, and the difference between the output current and the constant current sink will be applied either directly to ground through the single diode, or across the output load resistor, dependent upon the polarity. Disclosed also is a full-wave rectifier utilizing constant current sinks and voltage-to-current converters. Additionally, disclosed is a combination of the voltage-to-current converters with differential integrated circuit preamplifiers to boost the initial signal amplitude, and with low pass filtering applied so as to obtain a video or signal envelope output.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}