摘要:
A plurality of cascaded unit register circuits (38) which comprises a bidirectional shift register (30) include main stages and dummy stages at the top before the main stages and dummy stages at the bottom after the main stages. A k-th stage outputs a pulse P k in synchronization with a clock signal with a reference point N1 being at H level. The main stages include terminals NSF and NSB for setting N1 to H to which P k - 1 and P k+1 are input, respectively, and terminals NRB and NRF for setting N1 to L level to which P k - 2 and P k+2 are input, respectively. The order of generation of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched. Top dummy stages do not have NRB. Bottom dummy stages do not have NRF.
摘要:
A bidirectional shift register outputs pulses from a plurality of cascaded unit register circuits in a shift order which is one of a forward direction and a reverse direction. A λth stage of unit register circuit (38) has two set terminals connected to respective outputs of (λ-1)th and (λ+1)th stages and two reset terminals connected to respective outputs of (λ+2) th and (λ-2) th stages. The unit register circuit (38) sets, when a pulse is input to any one of the set terminals, a reference point N1 to an H level, and, when a pulse is input to any one of the reset terminals, N1 to an L level. The order of phase change of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched.
摘要:
A plurality of cascaded unit register circuits (38) which comprises a bidirectional shift register (30) include main stages and dummy stages at the top before the main stages and dummy stages at the bottom after the main stages. A k-th stage outputs a pulse P k in synchronization with a clock signal with a reference point N1 being at H level. The main stages include terminals NSF and NSB for setting N1 to H to which P k - 1 and P k+1 are input, respectively, and terminals NRB and NRF for setting N1 to L level to which P k - 2 and P k+2 are input, respectively. The order of generation of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched. Top dummy stages do not have NRB. Bottom dummy stages do not have NRF.