| 摘要 |
A pulse generator for developing current pulses with precisely controlled rise and fall times. These current pulses are made to pass through a gyro torquer in either one of two directions by means of switches. The gyro torquer current is reversed by digital logic in a pulse rebalanced loop. These current pulses pass through a resistor. The voltage at one end of the resistor is controlled by an operational amplifier. The voltage at the other end of the resistor is controlled so that periodically there is substantially no current flow through either the load or the resistor. This makes it possible to switch the direction of current flow when there is substantially no current flow through the load.
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