초록 ▼

An integrated circuit pulse generator which may be externally digitally conditioned to provide an output signal at a frequency falling within a predetermined range of signal frequencies corresponding to a specified frequency tolerance includes a fixed frequency oscillator having an external frequenc

An integrated circuit pulse generator which may be externally digitally conditioned to provide an output signal at a frequency falling within a predetermined range of signal frequencies corresponding to a specified frequency tolerance includes a fixed frequency oscillator having an external frequency determining crystal which provides electrical pulses at a fixed frequency that is within a given range of frequencies above a nominal frequency. A pulse inhibit means coupled to the fixed frequency oscillator includes a plurality of programmable input terminals and cyclically inhibits selectable numbers of the electrical pulses responsive to selective actuation of the programmable input terminals to controllably transform the fixed frequency in delta amounts to an output signal frequency within the predetermined range of frequencies. A plurality of fusible links within the integrated circuit couple the programmable input terminals to an actuating potential by a common bus to normally actuate each input, and are also coupled to external pins by address leads to permit application of fusible link opening current to certain ones of the fusible links for removing their corresponding programmable input/terminals from the actuating potential. As a result, selected programmable input terminals may be left actuated to thereby cause the pulse inhibitor to cyclically inhibit a selected number of the electrical pulses to transform the fixed frequency to an output signal frequency within the predetermined range of frequencies. Also disclosed is a system for automatically conditioning the integrated circuit pulse generator for providing an output signal at a frequency within the predetermined range of frequencies corresponding to the specified tolerance.

대표청구항 ▼

A digitally adjustable pulse generator for providing output pulses at an output frequency within a predetermined range of frequencies corresponding to a specified frequency tolerance, comprising: fixed frequency oscillator means for providing successive electrical pulses at a fixed frequency, said f

A digitally adjustable pulse generator for providing output pulses at an output frequency within a predetermined range of frequencies corresponding to a specified frequency tolerance, comprising: fixed frequency oscillator means for providing successive electrical pulses at a fixed frequency, said fixed frequency being within a given range of frequencies above a nominal frequency; an integrated circuit substrate containing pulse inhibit means coupled to said oscillator means and including a plurality of programmable input terminals, said pulse inhibit means adapted for cyclically inhibiting selected numbers of said electrical pulses responsive to selective application of actuating potential to said input terminals to derive an output signal at an output frequency within said given range of frequencies; a like plurality of fusible links included on said integrated circuit substrate, a respective given one of said fusible links coupling a respective given one of said programmalbe inputs to said actuating potential to thereby normally actuate each said programmable input terminal; and addressing means included on said integrated circuit substrate, said addressing means coupled to each one of said fusible links so as to permit the application of fusible link opening current to said fusible links for disconnecting selected ones of said programmable input terminals from said actuating potential and to thereby cause said pulse inhibit means to inhibit said selected number of said electrical pulses so that said derived output frequency is within said given range of frequencies; wherein said integrated circuit includes a plurality of external contact means coupled to said addressing means adapted to receive said fusible link opening current and said fusible links are coupled to said actuating potential through a common bus; and, a common external contact coupled to said common bus whereby said fusible links receive said opening current applied between said external contact means and said common external contact so that the output frequency of said generator may be adjusted externally to said integrated circuit.