Alternating polarity power supply control apparatus

• US 4,256,978 A
• Filed: 12/26/1978
• Issued: 03/17/1981
• Est. Priority Date: 12/26/1978
• Status: Expired due to Term

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Inventors: Pinckaers, B. Hubert
• Primary Examiner(s): Miller, Jr., Stanley D.
• Assistant Examiner(s): Davis, B. P.
• Application Number:
  US05/973,216
• Time in Patent Office: 812 Days
• Field of Search: 307/251, 307/279, 307/304, 307/268, 323/4, 357/22, 357/27
• US Class Current: 327/434
• CPC Class Codes: H03K 17/687 the devices being field-effect transistors

Abstract

An electronic switching circuit is provided for controlling transfer of electrical power from an alternating polarity electrical power supply to a load means through use of a field-effect transistor device as the primary power controlling element.

Claims

1. An electronic switching circuit for controlling transfer of electrical power from an alternating polarity electrical power supply means to a load means, said switching circuit comprising:

a first transfer control field-effect device provided in and on a substrate, said first transfer control field-effect device comprising;

a first channel region located at least in part in a first selected region of said substrate;

first and second terminating regions, separated by said first channel region, into which and out of which primary currents through said first field-effect device can, at least in part, pass upon electrical energization of said first and second terminating regions, said first terminating region being electrically connected to a first terminal means adapted for electrical connection to a first circuit portion arrangement which includes both said alternating polarity electrical power supply means and said load means, and said second terminating region being electrically connected to a second terminal means adapted for electrical connection to said first circuit portion arrangement; and

a gate region capable of affecting, upon electrical energization thereof, any current flow occurring through said first channel region as a result of electrical energization of said first and second terminating regions;

a bias control means having an electrical connection between a first location therein and a second location therein, and further, said bias control means being capable of selectively providing a bias voltage between said first and second locations therein upon electrical energization of said bias control means, said bias control means first location being electrically connected to said gate region;

a first unidirectional current conducting means having first and second terminating regions between which an asymmetrical current conducting capability is exhibited, said first unidirectional current conducting means first terminating region being electrically connected to one of said first and second terminal means, and said first unidirectional current conducting means second terminating region being electrically connected to said bias control means second location; and

a second unidirectional current conducting means having first and second terminating regions between which an asymmetrical current conducting capability is exhibited, said second unidirectional current conducting means first terminating region being electrically connected to that one of said first and second terminal means opposite that to which said first unidirectional current conducting means first terminating region is connected as aforesaid, and said second unidirectional current conducting means second terminating region being electrically connected to said bias control means second location, whereby electrical power can be selectively transferred from said alternating polarity electrical power supply means to said load means in correspondence with said selective providing of said bias voltage between said bias control means first and second locations.

2. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device being effectively an enhancement mode, n-channel, metal-oxide-semiconductor field-effect transistor (MOSFET), with said first field-effect device first and second terminating regions being source and drain regions therein, and with said gate region being separated from said first selected region of said substrate by an insulating layer;

said first unidirectional current conducting means being a first diode having an anode and a cathode, with said first diode cathode serving as said first unidirectional current conducting means first terminating region, and with said first diode anode serving as said first unidirectional current conducting means second terminating region; and

said second unidirectional current conducting means being a second diode having an anode and a cathode, with said second diode cathode serving as said second unidirectional current conducting means first terminating region, and with said second diode anode serving as said second unidirectional current conducting means second terminating region.

3. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device being effectively a depletion mode, n-channel, metal-oxide-semiconductor field-effect transistor (MOSFET), with said first field-effect device first and second terminating regions being source and drain regions therein, and with said gate region being separated from said first selected region of said substrate by an insulating layer;

said first unidirectional current conducting means being a first diode having an anode and a cathode, with said first diode cathode serving as said first unidirectional current conducting means first terminating region, and with said first diode anode serving as said first unidirectional current conducting means second terminating region; and

said second unidirectional current conducting means being a second diode having an anode and a cathode, with said second diode cathode serving as said second unidirectional current conducting means first terminating region, and with said second diode anode serving as said second unidirectional current conducting means second terminating region.

4. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device being effectively an enhancement mode, p-channel, metal-oxide-semiconductor field-effect transistor (MOSFET), with said first field-effect device first and second terminating regions being source and drain regions therein, and with said gate region being separated from said first selected region of said substrate by an insulating layer;

said first unidirectional current conducting means being a first diode having an anode and a cathode, with said first diode anode serving as said first unidirectional current conducting means first terminating region, and with said first diode cathode serving as said first unidirectional current conducting means second terminating region; and

said second unidirectional current conducting means being a second diode having an anode and a cathode, with said second diode anode serving as said second unidirectional current conducting means first terminating region, and with said second diode cathode serving as said second unidirectional current conducting means second terminating region.

5. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device being effectively a depletion mode, p-channel, metal-oxide-semiconductor field-effect transistor (MOSFET), with said first field-effect device first and second terminating regions being source and drain regions therein, and with said gate region being separated from said first selected region of said substrate by an insulating layer;

said first unidirectional current conducting means being a first diode having an anode and a cathode, with said first diode anode serving as said first unidirectional current conducting means first terminating region, and with said first diode cathode serving as said first unidirectional current conducting means second terminating region; and

said second unidirectional current conducting means being a second diode having an anode and a cathode, with said second diode anode serving as said second unidirectional current conducting means first terminating region, and with said second diode serving as said second unidirectional current conducting means second terminating region.

6. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device selectively being a selected one of effective n-channel and p-channel junction field-effect transistors (JFET), with said first field-effect device first and second terminating regions being source and drain regions therein; and

said first and second unidirectional current conducting means being first and second diodes, respectively, said first and second diodes each having an anode and a cathode serving as said terminating regions in said first and second unidirectional current conducting means.

7. The apparatus of claim 1 wherein said circuit further comprises:

said first transfer control field-effect device being effectively a metal-semiconductor field-effect transistor (MESFET), with said first field-effect device first and second terminating regions being source and drain regions therein; and

said first and second unidirectional current conducting means being first and second diodes, respectively, said first and second diodes each having an anode and a cathode serving as said terminating regions in said first and second unidirectional current conducting means.

8. The apparatus of claim 2 wherein said bias control means has resistive means directly electrically connected between said bias control means first and second locations.

9. The apparatus of claim 3 wherein said bias control means has resistive means directly electrically connected between said bias control means first and second locations.

10. The apparatus of claim 4 wherein said bias control means has resistive means directly electrically connected between said bias control means first and second locations.

11. The apparatus of claim 5 wherein said bias control means has resistive means directly electrically connected between said bias control means first and second locations.

12. The apparatus of claim 8 wherein said bias control means further comprises a selected one of said bias control means first and second locations being electrically connected to a control input switching means.

13. The apparatus of claim 9 wherein said bias control means further comprises a selected one of said bias control means first and second locations being electrically connected to a control input switching means.

14. The apparatus of claim 10 wherein said bias control means further comprises a selected one of said bias control means first and second locations being electrically connected to a control input switching means.

15. The apparatus of claim 11 wherein said bias control means further comprises a selected one of said bias control means first and second locations being electrically connected to a control input switching means.

16. The apparatus of claim 8 wherein said bias control means further comprises said bias control means first location being electrically connected to a third terminal means and said bias control means second location being electrically connected to a fourth terminal means, said third and fourth terminal means being adapted for electrical connection to a second circuit portion arrangement which includes a control input switching means and a constant polarity electrical power supply means having a positive terminal thereon electrically connected on said bias control means first location side of said second circuit arrangement.

17. The apparatus of claim 9 wherein said bias control means further comprises said bias control means first location being electrically connected to a third terminal means and said bias control means second location being electrically connected to a fourth terminal means, said third and fourth terminal means being adapted for electrical connection to a second circuit portion arrangement which includes a control input switching means and a constant polarity electrical power supply means having a positive terminal thereon electrically connected on said bias control means second location side of said second circuit arrangement.

18. The apparatus of claim 10 wherein said bias control means further comprises said bias control means first location being electrically connected to a third terminal means and said bias control means second location being electrically connected to a fourth terminal means, said third and fourth terminal means being adapted for electrical connection to a second circuit portion arrangement which includes a control input switching means and a constant polarity electrical power supply means having a positive terminal thereon electrically connected on said bias control means second location side of said second circuit arrangement.

19. The apparatus of claim 11 wherein said bias control means further comprises said bias control means first location being electrically connected to a third terminal means and said bias control means second location being electrically connected to a fourth terminal means, said third and fourth terminal means being adapted for electrical connection to a second circuit portion arrangement which includes a control input switching means and a constant polarity electrical power supply means having a positive terminal thereon electrically connected on said bias control means first location side of said second circuit arrangement.