Abstract A voltage dependent phase switch comprising a pair of transistors and a zener diode. An input signal is connected in series through the zener diode to drive the base of one of the transistors. The input signal is also connected to the base drive of an emitter follower transistor. When the input signal is negative and less in magnitude than the breakdown voltage of the zener diode then the emitter follower transistor is driven and an output signal is provided therefrom that increases linearly with increase in the input signal. However, when the input signal is negative and greater in magnitude than zener diode breakdown voltage then the transistor that is connected to the zener diode is driven and the voltage output decreases linearly with the increasing negative input voltage thereby providing a voltage dependent phase switch. In another embodiment of the invention an input signal circuit is provided which includes a DC source, a pulse generator and a sinusoidal signal generator wherein the currents are additive and provide a switching function in conjunction with the voltage dependent phase switch where the output sinusoidal signal is in-phase or 180* out of phase with the sinusoidal signal generator signal depending upon the state of the pulse generator.
A phase switching device comprising: a. an input signal generating means; b. a first means for providing an output signal in response to the input signal from said input generating means that has an output voltage that increases linearly with increase in said input signal; c. a second means for providing an output signal in response to the input signal from said input generating means that has an output voltage that decreases linearly with increase in said input signal; d. third means for applying said input signal directly to said first means; e. fourth means for preventing the application of said input signal to said second means when said input signal is below a predetermined input voltage level and allowing the application of said input signal to said second means when said input signal is above said predetermined voltage level; and f. said input signal generating means including a D.C. source, a pulse source, and a signal generator operatively connected in parallel.
Claim 2
Dependent Claim
162 words
A phase switching device comprising: a. an input signal generating means; b. a first means for providing an output signal in response to the input signal from said input generating means that has an output voltage that increases linearly with increase in said input signal; c. a second means for providing an output signal in response to the input signal from said input generating means that has an output voltage that decreases linearly with increase in said input signal; d. third means for applying said input signal directly to said first means; e. fourth means for preventing the application of said input signal to said second means when said input signal is below a predetermined input voltage level and allowing the application of said input signal to said second means when said input signal is above said predetermined voltage level; and f. said input signal generating means including a D.C. source, a pulse source, and a signal generator operatively connected in parallel.
Claim 3
Dependent Claim
54 words
The device of claim 1 wherein: a. said D.C. source has a voltage level that is below said predetermined voltage level; and b. said pulse source provides a pulse varying from about zero volts to a voltage level that when added to the voltage level of said D.C. source exceeds said predetermined voltage level.
Claim 4
Dependent Claim
38 words
The device of claim 1 wherein: a. said first and second means comprise first and second transistors; b. said fourth means comprises a zener diode; and c. said first transistor is operatively connected in an emitter follower configuration.
Claim 5
Dependent Claim
52 words
The device of claim 3 including: a. first and second output terminals; b. the emitter of said first transistor being operatively connected to the collector of said second transistor and to one of said output terminals; and c. the emitter of said second transistor being operatively connected to said second output terminal.
Claim 6
Dependent Claim
74 words
The device of claim 4 including: a. first and second input terminals to which said input signal is operatively connected; b. said third means operatively connecting the base of said first transistor to said first input terminal; c. the anode of said zener diode being operatively connected to said first input terminal; and d. said second input terminal being operatively connected to the emitter of said second transistor and to said second output terminal.