Frequency doubler and/or self-oscillating inverter

Claim 1

An apparatus for developing and outputting to a load, an output signal having a frequency double the frequency of an alternating input signal, said input signal having cycles each of which comprise two half-cycles, said apparatus comprising: full-wave rectifying means receptive of the alternating input signal for full-wave rectifying the alternating input signal and developing a full-wave rectified signal having positive half-sine loops each comprising a first half and a second half and each corresponding to a respective half-cycle of the alternating input signal; and frequency-doubling means receptive of the full-wave rectified signal for developing an output signal having a frequency double the frequency of the alternating input signal and having cycles each comprising a positive half-cycle and a negative half-cycle; said frequency-doubling means comprising a capacitor charging and developing current flow in a forward direction in response to the first half of each half-sine loop of the full-wave rectified signal and said capacitor discharging and developing current flow in a reverse direction in response to the second half of each half-sine loop of the full-wave rectified signal, a silicon controlled rectifier having its cathode grounded, its anode connected to the load and its gate connected to the capacitor so that the gate receives current developed in the forward direction rendering the silicon controlled rectifier conductive during the charging of the capacitor for providing a current path and allowing current flow to the load in the forward direction for developing the positive half-cycles of the output signal, and said silicon controlled rectifier rendered non-conductive during the discharging of the capacitor, and a MOS-type field-effect transistor having its drain connected to the load and its gate and source connected to the capacitor so that the gate receives current developed in the reverse direction rendering the field-effect transistor conductive during the discharging of the capacitor for providing a current path and allowing current flow to the load in the reverse direction for developing the negative half-cycles of the output signal, and said field-effect transistor rendered non-conductive during the charging of the capacitor.

Claim 2

An apparatus for developing and outputting to a load, an output signal having a frequency double the frequency of an alternating input signal, said input signal having cycles each of which comprise two half-cycles, said apparatus comprising: full-wave rectifying means receptive of the alternating input signal for full-wave rectifying the alternating input signal and developing a full-wave rectified signal having positive half-sine loops each comprising a first half and a second half and each corresponding to a respective half-cycle of the alternating input signal; and frequency-doubling means receptive of the full-wave rectified signal for developing an output signal having a frequency double the frequency of the alternating input signal and having cycles each comprising a positive half-cycle and a negative half-cycle; said frequency-doubling means comprising a capacitor charging and developing current flow in a forward direction in response to the first half of each half-sine loop of the full-wave rectified signal and said capacitor discharging and developing current flow in a reverse direction in response to the second half of each half-sine loop of the full-wave rectified signal, a silicon controlled rectifier having its cathode grounded, its anode connected to the load and its gate connected to the capacitor so that the gate receives current developed in the forward direction rendering the silicon controlled rectifier conductive during the charging of the capacitor for providing a current path and allowing current flow to the load in the forward direction for developing the positive half-cycles of the output signal, and said silicon controlled rectifier rendered non-conductive during the discharging of the capacitor, and a MOS-type field-effect transistor having its drain connected to the load and its gate and source connected to the capacitor so that the gate receives current developed in the reverse direction rendering the field-effect transistor conductive during the discharging of the capacitor for providing a current path and allowing current flow to the load in the reverse direction for developing the negative half-cycles of the output signal, and said field-effect transistor rendered non-conductive during the charging of the capacitor.