摘要:
An improved ladder network for use in a converter utilizing a single ladder network with single pole double throw switches to simultaneously implement nonlinear sine and cosine functions.
摘要:
A comparator network in a successive approximation synchro-to-digital converter uses two comparators to determine the quadrant of the synchro angle and then uses one of these comparators as a steering voltage comparator to determine the less significant bits of the synchro angle. Fractions of the sine and cosine analog inputs are cross-coupled to the comparators to provide inherent quantization error centering.
摘要:
An improved synchro to digital tracking converter which utilizes an approximation to generate information octally and uses digital complementing to generate information over the balance of the quadrant is implemented using a single ladder network to provide a system having fewer components and yet a higher intrinsic accuracy.
摘要:
In a digital to synchro/resolver converter which has an intrinsic transformation ratio variation with respect to input angle greater than desired in a given application, the intrinsic variation is corrected by applying a correction to the reference voltage used in carrying out the digital to synchro conversion.
摘要:
A digital to analog resolver converter uses a digital to analog converter to convert a part of the digital input to a corresponding analog angle value. This analog angle value is applied to sine and cosine function generators which use the equations of chords to approximate the value of the sine and cosine functions in one octant. Bits of the digital input are used to select slope values from the chord equations for approximating the sine and cosine of the analog angle value. The digital to analog resolver converter uses the minimum number of precision resistors to generate the sine and cosine slope and intercept values for the equations of a given number of approximating chords.