Abstract: A two terminal transfer linearization circuit is provided for linearizing the AGC voltage of an AGC amplifier by providing a selectively controllable nonlinear current-vs-voltage response curve with adjustable curvature. A pair of end terminals have a first circuit branch therebetween forming a voltage divider for supplying base drive voltage to a transistor in a second parallel circuit branch between the end terminals. A third parallel resistorless circuit branch is provided through a second transistor having base drive voltage across a third resistor in the second circuit branch. As the voltage across the end terminals increases, the current through the first transistor increases and this current increases the base drive voltage to the second transistor to turn on the latter in nonlinear manner. The shape and curvature of the resultant current-vs-voltage response curve is selectively adjusted by variable resistors in the first and second circuit branches.

Abstract: A split phase delay equalizer is provided which reduces loss without resorting to high values of load impedance. The equalizer has a pair of parallel circuit branches, one of which is through the base and collector of a transistor, and the other through a reactance network connected between the collector and base of the transistor.

Abstract: A split phase delay equalizer is constructed using a single transformer. An adjustment for Q loss is provided by a flat loss shift in the amplitude response of the equalizer down to a level at or below the lowest Q loss dip level.

Abstract: Stray reactance compensation is provided in a split phase delay equalizer by inserting an auxiliary compensating small reactance in the substantially real arm circuit branch which provides a third order response equal and opposite to the deviation from second to third order in the amplitude response curve caused by stray reactance deviated phase reversal from the ideal.

Abstract: The present invention comprises a circuit for addition to a non-linear amplifier wherein the non-linearity is of the first degree. The circuit essentially adds a signal (or signal variable impedance path) to that already existing to remove non-linearity in operating characteristics over a given range of voltage.

Abstract: The method of designing a circuit having a substantially constant delay over a given frequency band and having a substantially linear attenuation characteristic or amplitude change characteristic over the same frequency band and the product resulting from such a design approach. One such approach uses a primary tank circuit having a given Q and amplitude response feeding two secondary tank circuits each of which have a higher Q and amplitude response and wherein the resonant points are on either side of the resonant point of the primary tank. By adjusting the Q, amplitude response and resonant frequency of the three tanks, the "delayless" and linear amplitude change characteristics over a given frequency band can be achieved.

Abstract: The present circuit comprises a simple variable capacitive coupling to ground for two outputs of a two-output amplifier wherein the frequency gain is either boosted or cut in accordance with the setting of a reactive coupling device. For high frequencies this may be capacitive and for low frequencies this may be inductive.

Abstract: A circuit for providing AC gain control while minimizing the change in AC impedance and eliminating any effects on DC biasing of following stages.