Cross-coupled capacitor for AC performance tuning

Claim 1

A non-linear integrated circuit comprising at least one current switch having one input and two output terminals and producing opposite phase output signals on said two output terminals in response to a single polarity input signal at said input terminal, a first emitter follower having a base electrode connected to one of said two output terminals, a second emitter follower having its base electrode connected to the other of said two output terminals, capacitance means for delaying the transitions of said opposite phase output signals connected directly between said base electrodes of said first and second emitter followers, said capacitance means consisting of first and second voltage variable P/N junction capacitors connected in series with opposite directions of conductivity, said direct connection between said base electrodes of said series connected first and second voltage variable P/N junction capacitors producing a large dv/dt across said capacitance means due to said output signals being opposite in phase resulting in the effective capacitance seen by each of said output terminals being substantially greater than the capacitances of said first and second voltage variable P/N junction capacitors, and the capacitance of said capacitance means being substantially independent of voltage due to said first and second voltage variable P/N junction capacitors being connected with opposite directions of conductivity.