Abstract: The present invention provides precision adjustment of an electronic signal over a range greater than 360.degree. with a single control input which may be either mechanical or electrical.

Abstract: An RC circuit with voltage controlled delay is provided. The circuit comprises a matched pair of RC delay elements, driven by outputs of a pair of amplifiers comprising a fixed gain amplifier and a variable gain amplifier having gain m so that the delay is dependent on a gain control voltage. Preferably, the circuit is operable in a regime wherein the gain m is linearly dependent on an input control voltage so that the circuit delay is also linearly dependent on the input control voltage. Advantageously, where the amplifier gain has non-linear dependence on a gain control voltage, a control voltage generator comprising a linear to logarithmic converter is used to provide an effective linear operation in response to an input control voltage. The circuit is preferably operated in differential mode, with RC circuit elements implemented simply as resistors and capacitors, and the amplifier and active elements provided by bipolar transistors.

Abstract: A signal-delaying capacitive circuit applied to a node in a microcircuit device is immunized against the variation of the supply voltage by a metal-oxide semiconductor connected in series between the node and the signal-delaying capacitive circuit. The gate of tile semiconductor is biased with a voltage signal proportional to the supply voltage, whereby the resistance of the semiconductor is increased as the supply voltage decreases; thus, isolating the capacitive circuit from the node and reducing the delay.